Hi pls help me and explain

Hi Pls Help Me And Explain

Answers

Answer 1

The linear model representing the information is y = 600x + 1500.

To produce 12 solar heaters it cost $8,700.

The domain of the linear model is [1, 80].

What is an equation of a line?

The equation of a line is given by:

y = mx + c

where m is the slope of the line and c is the y-intercept.

Example:

The slope of the line y = 2x + 3 is 2.

The slope of a line that passes through (1, 2) and (2, 3) is 1.

We have,

10 solar heaters = $7500

20 solar heaters = $13,500

The linear model can be in the form of y = mx + c

m = (13,500 - 7500)/(20 - 10)

m = 6000/10

m = 600

Now,

(10, 7500) = (x, y)

7500 = 600 x 10 + c

c = 7500 - 6000

c = 1500

Now,

The linear model is y = 600x + 1500.

Where y is the cost of x solar heaters.

Now,

x = 12,

y = 600 x 12 + 1500

y = 7200 + 1500

y = 8700

Now,

y ≤ 50,000

We see that,

x = 81

y = 600 x 81 + 1500 = 48600 + 1500 = 50,100

x = 80

y = 600 x 80 + 1500 = 48000 + 1500 = 49,500

The domain is from x = 1 to x = 80.

Thus,

The linear model is y = 600x + 1500.

$8,700 is the cost to produce 12 solar heaters.

The domain is [1, 80].

Learn more about equation of a line here:

https://brainly.com/question/23087740

#SPJ1


Related Questions

Convince me that -3to the second power is not equal to (-3) to the second power

Answers

Answer:

Yeah, they are not equal.

Step-by-step explanation:

Given statement,

→ -3 to the second power is not equal to (-3) to the second power.

Forming the equation,

→ -3² ≠ (-3)²

Let's check the equation,

→ -3² = (-3)²

→ -(3)² = (-3)²

→ -9 ≠ 9

→ LHS ≠ RHS

Hence, they are not equal.

While shootings baskets at a basketball hoop, you make 36 out of 80 shots. Your friend makes 43.75% of the shots. Between the two of you, who made the higher percentage of shots?

Answers

45%

You made a higher percentage of shots.

36/80*100 = 45%

To learn more about percentage click here: https://brainly.in/question/21062337

Find the circumcenter of the triangle (-2,4) (-2,-1) (1,-1)

Answers

Answer:

( [tex]-\frac{1}{2}[/tex] , [tex]\frac{3}{2}[/tex] )  

Step-by-step explanation:

( [tex]x_{1}[/tex] , [tex]y_{1}[/tex] )

( [tex]x_{2}[/tex] , [tex]y_{2}[/tex] )

Coordinates of midpoint are

( [tex]\frac{x_{1} +x_{2} }{2}[/tex] , [tex]\frac{y_{1} +y_{2} }{2}[/tex] )

~~~~~~~~~~~~~~~~~~~~

The figure is right triangle.

The circumcenter is the middle of the hypotenuse.

( - 2, 4 )

( 1 , - 1 )

( [tex]-\frac{1}{2}[/tex] , [tex]\frac{3}{2}[/tex] )

I need help with this problem, look at image below.

Answers

Answer:

no

Step-by-step explanation:

The three angles of a triangle are 180, but the sum of the three angles in the figure is 200.so its impossible .

A rectangle is constructed on a semicircle so that the length equals the diameter. The rectangle is 3 times as long as it is wide. The total area of the figure is 750 inches squared. Find the approximate dimensions of the rectangle.

Answers

A rectangle is constructed on a semicircle so that the length equals the diameter. The width of the rectangle is approximately 10.65 inches.

What are the approximate dimensions of the rectangle.?

Generally, Let the width of the rectangle be x. Then the length of the rectangle is 3x.

The diameter of the semicircle is also the length of the rectangle, so it is 3x.

The area of the rectangle is x*(3x) = 3x^2. The area of the semicircle is (1/2)πr^2, where r is the radius of the semicircle. Since the diameter of the semicircle is 3x, the radius is (3x)/2. The area of the semicircle is (1/2)π((3x)/2)^2 = (9/8)πx^2.

The total area of the figure is the sum of the area of the rectangle and the area of the semicircle. We can set up the equation:

3x^2 + (9/8)πx^2 = 750

(21/8)πx^2 = 750

x^2 = 750/(21/8)*π

x = √(750/(21/8)*π)

To find the approximate dimensions of the rectangle, we can use the fact that pi is approximately 3.14. This gives us:

x = √(750/(21/8)*3.14)

= √(750/6.71)

= √(112.64)

= approximately 10.65 inches.

The width of the rectangle is approximately 10.65 inches. The length of the rectangle is 3 times the width, so it is approximately 31.95 inches.

Read more about rectangle

https://brainly.com/question/29123947

#SPJ1

A sandwich store charges a $10 delivery fee, and $4.50 for each sandwich.

a. What is the total cost (sandwiches and delivery charge) if an office orders 6 sandwiches?

Type the answer in the box below.

$


b. What is the total cost for x sandwiches?

Type the answer in the box below.

Answers

A : 37
B: 4.50 for each sandwich 6 • 4.50= 27

Which one is nonlinear
y = x + x + 3
y=x2+6
y = 4x - 5
y=1/x+3

Answers

Step-by-step explanation:

I think it's y=x² +6 because this is a quadratic equation

Use Pythagoras' theorem to work out the length of
the side AD in the rectangle below.
Give your answer in centimetres to 2 d.p.
B
A
6.3 cm
с
4 cm
D

Answers

The value of AD in one decimal place for the given triangle is 9.8 cm.

What is a triangle?

A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices.

Triangle is a very common figure to deal with our daily life for example in our daily life to measure the height of any tower then there is a huge application of the right angle triangle.

As per the given by triangle ΔADE

By Pythagoras' theorem,

(AD)² = (AE)² + (ED)²

(AD)² = 4² + 9²

(AD)² = 97

AD = 9.8

Hence "The value of AD in one decimal place for the given triangle is 9.8 cm".

For more information about triangles,

https://brainly.com/question/2773823

#SPJ1

The missing image is attached below,

What is the solution for −6x 9≤2−5(x 1)? responses x≤4 x ≤ 4 x≥4 x ≥ 4 x≥12 x ≥ 12 x≤12

Answers

It a because it’s no other answer

1 1/2 times 3/5 and write it as a division sentence too.

Answers

Answer:

9/10 =0.9

Step-by-step explanation:

We have been given to calculate 1 1/2 times 3/5 . First of all ,we shall convert 1 1/2 ( a mixed fraction form) to a proper fraction form .

1 1/2 is actually 1 + 1/2 =3/2

1 1/2 X 3/5  =3/2 X 3/5 =9/10

9/10  is actually 0.9

Therefore we have finally converted this into division sentence too

Write two expressions for the perimeter of the figure.
2
8
4x
4
7x
Note: The figure is not drawn to scale.
(a) Use all five side lengths.
perimeter = 0+0+0+0+0
(b) Simplify the expression from part (a).
perimeter =

Answers

The perimeter can be calculated using the formulas 22x+23 and 2x+3x+17x+7+16.

How to calculate perimeter of two expression ?

The length of a shape's outline is its perimeter. You must add the lengths of all four sides of a rectangle or square to determine its perimeter. In this instance, x represents the rectangle's length and y its width. The surface of a shape's area is measured.

The total length of the four sides makes up the perimeter (P) of a rectangle. A rectangle has two equal lengths and two equal widths since its opposite sides are equal. The following is the formula for calculating a rectangle's perimeter: The formula for perimeter is length + length + width + width. P = l + l + w + w.

you want to add the variables of the same kind in this case

2x        

3x         7

17x       16

_________

22x  +     23

Therefore Two expressions for the perimeter would be 22x+23 and 2x+3x+17x+7+16

The complete question is : Write two expressions for the perimeter of the figure.

2x

7

3x

172

16

Note: The figure is not drawn to scale.

(a) Use all five side lengths.

perimeter - ] + + + +

(b) Simplify the expression from part (a).

perimeter =

Х

$ ?

To learn more about perimeter refer to :

https://brainly.com/question/19819849

#SPJ1

points a and b lie on a circle with radius 4 and arc ab has length meters. the length of arc 4pi/5 is what fraction of the circumference of the circle?

Answers

1/10  fraction of the circumference of the circle .

What is arc?

An arc is any straight line that connects two locations. The term "arc length" refers to an arc's length. An ordered pair of adjacent vertices is referred to as a graph arc in a graph.

                        Any section of the circle's circumference (other than the entire curve) is referred to as an arc.

C = 2πr

C - circumference of a circle

r - radius of a circle

r =  4

Then

C = 2π • 4 = 8π

Writing the fraction:

(4π/5)/8π = 1/10

Learn more about arc

brainly.com/question/18741430

#SPJ4

A clothing company has 4,630 shirts to ship. It can fit 130 shirts in a shipping box .How many boxes are to ship all the shirts?

Answers

Answer: 36 boxes

Step-by-step explanation:

4630 divided by 130 = 35.6 boxes

Then we ground up to 36 boxes

If you can, please give me a Brainliest, thank you!

You’ll need 36 boxes because you need to divide 4630 and 130 which will get you 35.615… so you need 36 boxes

If you flip a coin 300 times, how many times would you expect it to land on
tails?

Answers

If you flip a coin 300 times, 150times would you expect it to land on

tails

How many times would you expect it to land on tails?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.

There are three primary categories of algebraic expressions, including:

Numeral Expression.

Binary Expression

Expression of a polynomial.

Mathematical operators like addition, subtraction, multiplication, and division are used to create expressions in writing. For instance, the mathematical equation for "4 added to 2" will be 2+4.

Given

flip a coin = 300

So the coin have 2 sides , one side is head and other side is tail

300/2

=150

So the 150 times the tail will come  while Flip  a coin.

To learn more about mathematical expression refer to :

https://brainly.com/question/1859113

#SPJ1

What is the 9th term of the sequence 2,8,32,128

Answers

Answer: 131072

Step-by-step explanation:

Basically the sequence is just being multiplied by 4, like 2(4)=8 and 8 is the next number in the sequence or 32(4)=128 which then again is the next number in the sequence.

Is n-3^2 linear explain why please

Answers

Answer:

y=n-3^2 is linear

Step-by-step explanation:

A linear equation is an equation between two variables that give a straight line with plotted on a graph.

The two variables used are "n" and "3^2"

When graphed, it forms a diagonal, straight line.

Please help!!!

find y and x

Answers

Answer:

  a)  y = 16/x²

  b)  x = 4/5

Step-by-step explanation:

You want the equation for y in terms of x when y is inversely proportional to the square of x, and y is 16 when x is 1. Further, you want the value of x when y is 25.

(a) Relation

The wording "inversely proportional to the square" means the form of the equation is ...

  y = k/x² . . . . . . where k is the constant of proportionality

The value of k can be found from the given (x, y) pair.

  k = x²y = (1)²(16) = 16

The equation is ...

  y = 16/x²

(b) Value of x

Solving for x gives ...

  x = √(16/y)

Then the value of x for y = 25 is ...

  x = √(16/25)

  x = 4/5

a local winery bottles 14 different white wines. to help customers with their purchasing choice, the winery offers customers 5 white wine tasting samples free of charge. how many ways does a customer have to choose 5 different white wines to taste

Answers

a local winery bottles 14 different white wines. to help customers with their purchasing choice, the winery offers customers 5 white wine tasting samples free of charge 2002 many ways does a customer have to choose 5 different white wines to taste, using the concept of combination formula.

What is combination formula?

The number of possible ways to choose items from a collection when the order of choice is irrelevant is determined using the combination formula. Combination, to put it simply, is the process of choosing items or things from a bigger group where order is irrelevant.

The combination formula is: n! / (n-r)! r! , where n is the total number of items (14 in this case) and r is the number of items being selected at once (5 in this case),

Plugging our numbers into the formula we get:

= 14! / (14-5)! 5!

= 2002

After simplifying, we get 2002.

So, there are 2002 ways of picking 5 different white wines to taste from a group of 14 local winery bottles.

To know more about combination formula refer to:

https://brainly.com/question/28065038

#SPJ4

HELP ASAP!!


A quadrilateral has 4 sides. One angle of a regular quadrilateral measures (6w+13) Determine the value of w. Round to the nearest whole number
Ow=13
Ow=23
Ow=59
Ow=90

Answers

Answer:

  (a)  w = 13

Step-by-step explanation:

You have a regular quadrilateral with interior angle measure (6w+13)°, and you want the value of w to the nearest integer.

Regular quadrilateral

A regular quadrilateral is a square. Its interior angles are 90°, so we have ...

  6w +13 = 90

  6w = 77

  w = 12.833...

  w ≈ 13

The value of w to the nearest whole number is 13.

fully simplify3d/ac x 2ad/30

Answers

The value of the equation 3d/ac x 2ad/30 is ( d² / 5c )

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is given by

A = 3d/ac x 2ad/30   be equation (1)

On simplifying the equation , we get

A = 3d/ac x 2ad/30  

A = 6ad² / 30ac

On further simplification of the equation , we get

The value of A = 1/5 ( ad² / ac )

The value of A = 1/5 ( d²/c )

Therefore , the value of A is  ( d² / 5c ) or A = 1/5 ( d²/c )

Hence , The value of the equation 3d/ac x 2ad/30 is ( d² / 5c ) or

A = 1/5 ( d²/c )

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ1

Triangle JKL is similar to triangle STU. What is the length of side LK?

Answers

Using mathematical operations, we can conclude that the length of LK is 1.25 units in triangle JKL.

What are mathematical operations?

A mathematical "operation" is indeed the method by which a value utilizes operands and a math operator.

The supplied operands or numbers must conform to a set of predefined rules that are connected to the symbol of the math operator.

Parentheses, Exponents, Arithmetic, Division, and Addition Simple arithmetic is also known as PEMDAS (from left to right).

So, we know that the given triangles are similar:

Then, the length of line LK will be:

JK/ST = LK/UT

Solve this as follows:

JK/ST = LK/UT

2.5/10 = LK/5

10LK = 2.5(5)

10LK = 12.5

LK = 12.5/10

LK = 1.25


Therefore, using mathematical operations, we can conclude that the length of LK is 1.25 units in triangle JKL.

Know more about mathematical operations here:

brainly.com/question/28937023

#SPJ1

Alan travel 8 2/3 kilometer to get to chool. He ran 1 10/11 kilometer and walked the ret. How many kilometer were left to walk?

Answers

If Alan had ran 1 10/11 kilometer and walked the ret so his remaining distance from school is 6 5/11 kilometer.

What is called distance?

Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.

What is the formula for distance?

Learn how to apply the Pythagorean theorem to find the distance between two points using the distance formula. The Pythagorean theorem can be rewritten as d=√((x_2-x_1)²+(y_2-y_1)²) to calculate the separation between any two locations.

As the total travel of alan from his school is

=8 2/3 kilometer

according to given condition;

he has traveled;

=1 10/11 kilometer

so his remaining travel from his school is;

=8 2/3 kilometer-1 10/11 kilometer

= 6 5/11 kilometer

To learn more about distance, visit:

brainly.com/question/15172156

#SPJ4

the probability that a restaurant passes its health department inspection is 0.94. the owners of 58 restaurants are surveyed to see if their restaurants passed inspection. For each binomial experiment described, find the mean, the variance and the standard deviation!

Answers

The mean , standard deviation, and the variance of each binomial experiment using given probability and sample of restaurant owners surveyed is equal to  54.52 , 1.808, 3.2712 respectively.

As given in the question,

Let success be defined by health department inspection is passed by restaurant

Probability of success rate 'p' = 0.94

Value of ' 1 - p ' = 1 - 0.94

                         = 0.06

Number of owners of restaurant which are surveyed 'n' = 58

For the given binomial experiments calculation of the following distributions are:

Mean 'μ' = np

              = 58 × 0.94

              = 54.52

Standard deviation 'σ' = √ np (1 - p)

                                    = √ 58 × 0.94 × 0.06

                                    = √3.2712

                                    = 1.808

Variance 'σ²' =  np( 1 - p )

                     = 58 × 0.94 × 0.06

                     = 3.2712

Therefore, the mean , standard deviation , and the variance from the given probability and sample size is equal to 54.52 , 1.808, 3.2712 respectively.

Learn more about probability here

brainly.com/question/11234923

#SPJ4

In a math class with 19 students, a test was given the same day that an assignment was due. There were 11 students who passed the test and 14 students who completed the assignment. There were 3 students who failed the test and also did not complete the assignment. What is the probability that a student chosen randomly from the class completed the homework?

Answers

The chance that a student is selected at random from the class who passed the exam and finished the assignment is 0.2105

Describe probability.

Probability refers to potential. The occurrence of a random event is the subject. Probability values are limited to the range of 0 to 1. Its fundamental notion is that something is probable to occur. It is the proportion of favorable events to all other events.

A exam and an assignment were due on the same day in a math class with 19 pupils.

There were 14 students that finished the assignment, and 11 of them completed the test.

3 pupils both failed the exam and didn't finish the assignment.

Then the probability that a student is chosen randomly from the class passed the test and completed the homework will be

The number of the student who has done at least one assignment or passed the test is 19 - 3 = 16

n(A) = passes student

n(B) = given assignment

Then we have

n(A ∩B) = n(A) + n(B) - n (A ∪B )

n(A ∩B) = 11 + 14 - 16

n(A ∩B) = 9

Then the probability will be

P = 9C2 /19C2

P = 36/171

P = 0.2105

The probability that a student chosen randomly from the class completed the homework is 0.2105

To know more about  probability click the link:

brainly.com/question/795909

#SPJ1

For the function g(x) = -2x - 5, determine g(6)
A) -10
B)-17

Answers

Answer:

-17

Step-by-step explanation:

replace x with 6

g(6)=-2(6)-5

g(6)=-12-5

g(6)= -17

hopes this helps please mark brainliest

a regional director responsible for business development in the state of pennsylvania is concerned about the number of small business failures. if the mean number of small business failures per month is 14, what is the probability that exactly 5 small businesses will fail during a given month? assume that the probability of a failure is the same for any two months and that the occurrence or non occurrence of a failure in any month is independent of failures in any other month. (round your answer to four decimal places.) g

Answers

The probability that exactly 5 small businesses will fail during a given month 0.0037268.

The Poisson distribution would be used to calculate the likelihood that different counts of the same event will occur within a constrained time period. It is viewed as a discrete distribution since it evaluates counts. The distribution displays identical mean and dispersion values.

The pmf of the Poisson distribution is

[tex]p(x)=\frac{e^{\lambda} \lambda^{x}}{x!}[/tex]

The mean total number of small business failures λ=14

Let x represent the number of failed small businesses in a given month.

X~P(14)

X follows the Poisson distribution since the likelihood of failure stays constant for two months and the mean number of failures per month is 14.

The likelihood that precisely four small firms would fail in a given month must be calculated.

P(X=5)

[tex]P(X=5)= \frac{e^{14} \ 14^{5}}{5!}[/tex]

P(X=5)= 0.44721/5!

P(X=5)=0.0037268.

In a month there is 0.0037 that is 3.7% probability that a small business fail.

To learn more about Poisson distribution refer here

https://brainly.com/question/17280826#

#SPJ4

can someone explain this to me? i have an answer key but don’t know how to do it

Answers

Check the picture below.

To make orange fizz, Noah mixe 4 coop of powder with 6 cup of water. Andre mixe 5 coop of powder with 8 cup of water. Create a double number line or a table that how different amount of powder and water that tate the ame a noah' mixture

Answers

5 scoops of powder are combined with 8 glasses of water by Noah.

What is unitary method ?

Area is the total amount of space that an object's shape or a flat (2-D) surface occupy.

Create a square on paper by using a pencil. Two dimensions make it up. A shape's area on paper is the space it takes up.

Imagine that your square is made up of smaller unit squares.

The area of a figure is equal to the number of unit squares required to completely cover the surface area of a particular 2-D shape. Square cms, square feet, square inches, square meters, etc. are a few common units for measuring area.

To get the area of the square figures presented below, draw unit squares with 1-centimeter sides. Therefore, the shape will be measured.

Hence, 5 scoops of powder are combined with 8 glasses of water by Noah.

learn more about unitary method click here:

brainly.com/question/24587372

#SPJ4

If Y varies directly with X and X=5 and Y=15 what would be the value of Y if X=12

Answers

Answer:

i think 3

Step-by-step explanation:

determine whether a triangle with the given vertices is a scalene, isosceles, or equilateral triangle. check all that apply​

Answers

Answer: the first one(triangle ABC) is scalene, the second one(triangle TRI) is Isosceles, and the last one(triangle PQR) is

Isosceles

Step-by-step explanation: graph each joint is Desmos online calculator

Other Questions
new mother is attempting to breastfeed for the first time. the nurse notices that the client has inverted nipples. what nursing action can the nurse take to assist the client in breastfeeding the newborn? Suppose that scores on the mathematics part of the National Assessment of EducationalProgress (NAEP) test for high school seniors follow a normal distribution with mean 240 and standard deviation 27. In a random sample of 49 students, find the probability that their average score is between 200 and 250. 1-a)divide both sides by 2 and then subtract 1.1b)divide both sides by 2 and then add 1.1C)multiply both sides by 2 and then subtract 1.1 d)multiply both sides by 2 and then add 1.13-a)add or b)subtract 4-a) multiply b) divide 5.The population of arctic foxes in Yukon can be modelled by the following equation:P = 400 cos(30t - 180) + 1100Where 't' represents the number of years since 1992.a.What was the population of arctic foxes in Yukon in 1992?b. What are the maximum and minimum number of arctic foxes?C. Sketch a graph that represents how the population of artic foxes changes over time (since 1992).D. What will be the population of arctic foxes in 2030?E. When was the first time the population of arctic foxes reached 1300 (since 1992)? which neurotransmitter has been most often implicated in anxiety disorders because of the effects of benzodiazepines? what effect does hemingway limited use of adjectives have i need someone to solve this absolute value inequaility -3{x + 2} _< -9 How does the following quote contribute to the development of the main ideas in the speech? "We decided to raise our voices and tell them: 'Have you not learnt, have you not learnt that in the Holy Quran Allah says: if you kill one person it is as if you kill the whole humanity?'" using the graph, determine the question of the axis of symmetry I need alot of help with this question??? Amazon installing "Amazon Lockers" in grocery, 7-Eleven, and drugstores that accept packages for later pickup, in order to combat issues with missing deliveries or having packages stolen, is an example of which type of strategy?A) Forward integrationB) Backward integrationC) Horizontal integrationD) Related diversificationE) Unrelated diversification Which of the following policies did Napoleon promote in the Europeanterritories he conquered?OA. Establishment of new coloniesOB. Religious toleranceC. Free and fair electionsD. Execution of royaltySUBMIT A sample of 200g of an isotope decays to another isotope according to the function A(t)=200 e.(a) How much of the initial sample will be left in the sample after 25 years?(b) How long will it take the initial sample to decay to half of its original amount? How many protons, neutrons, and electrons does Iron (Fe) have if it has a +4 charge? Find the rate of change shown in the table. X 1 2 3 4 Y -3 -q -15 -21 solve the inequality n minus four sevenths is greater than or equal to negative two thirds for n. n is greater than or equal to negative 2 over twenty one n is less than or equal to two over twenty one n is greater than or equal to negative twenty six over twenty one n is less than or equal to twenty six over twenty one I need another answer quick! This answer is worth 45 points!_______________________________________________How does the author of "History in the Making" develop the setting in the final two paragraphs of the passage?Responsesby emphasizing that the flight could only take place if the weather conditions were mildby emphasizing that the flight could only take place if the weather conditions were mildby explaining how the strong winds and clear weather contributed to the success of the Wright brothers' first flight.by explaining how the strong winds and clear weather contributed to the success of the Wright brothers' first flight.by describing the sights, sounds, and feelings around the Wright brothers' first flightby describing the sights, sounds, and feelings around the Wright brothers' first flightby explaining the effect of the sand dunes on the quality of the plane's landing which of the following would result in a higher equilibrium price for pizza? assume that pizza is a normal good. (choose all that apply) Find the additive inverse of -[tex]\frac{1}{2}[/tex] judy tests a common household substance and finds that it has a ph of 7. what type of substance is in the scenario?