Where x = 3, and the value of y = 90;
For the expression y = x -2, when x = 4, y = 2, when x = -2, y = -9
What is the computation for the above?Given:
y = 10x²................................1
Where x = 3, We make the required substitution
y = 10 x (3)²
y = 10 x 9
Hence,
y = 90
For the given expression:
Y = x -2.....................................2
Where x = 4, We make the required substitution
= 4 -2
hence,
y = 2
Where x = -7, We make the required substitution
y = 7
y = -7-2
Hence
y = -9
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Identify all the sets which each number belongs. 15,-5.075,and π
The sets of numbers which each of the numbers given belong to as required in the task content is as follows;
15; Real, rational and Integers.-5.075; Real, rational and decimal.π; Real, Irrational and decimal.To what sets do all three numbers as given belong?As evident in the task content, the sets to which the three numbers belong is to be determined.
Hence, taking the numbers one after the other; we have;
15 => The number 15 belongs to the set of real numbers, rational numbers and most particularly, integers.
-5.075 => The number -5.075 belongs to the set of real numbers, rational numbers, and most particularly, decimals.
π => The number represented by π belongs to the set of real numbers, irrational numbers and it's numerical value is a non-terminal and non-repeating decimal.
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What is the relationship between multiplying and factoring? You multiply numbers or expressions to produce a (select). You factor a product into the numbers or(select)that were multiplied to produce it.
Answer:
Factoring polynomials is the inverse process of multiplying polynomials. After factoring a polynomial, if we divide the polynomial with the factors then the remainder will be zero.
. What values of x will make the absolute value equation, 2x - 4= 15, true?
After factorization, the absolute value of the variable 'x' is 9.
What is factorization method?
The factorization method is used for the quadratic based equation whose highest degree is either two or more than two. Depending upon the degree of the variable, the number of factors are calculated. And by substituting the calculated value to check whether the answer is correct or not.
According to the question, the given linear equation is: |2x - 4| = 15
Now, to calculate the value of the variable 'x' by using factorization method. And to remove the bars which represent absolute value that means positive values
Required expression: |2x - 4| = 15
⇒ 2x = 15 + 4 = 19
⇒ x = 19/2 = 9.5
After factorization, the absolute value of the variable 'x' is 9.
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the shapes below are mathematically similar 10,14,28,x
WE CAN USE THE SIMILARITY THEOREM WHEREIN
[tex] \frac{14}{28} = \frac{10}{x} \\ [/tex]
THE PROPORTIONS OF SIDES OF THE SIMILAR SHAPES A RE EQUAL.
NOW TO SIMPLIFY WE CAN DO CROSS MULTIPLICATION.
[tex]14(x) = 28(10) \\ 14x = 280 \\ \frac{14x}{14} = \frac{280}{14} \\ x = 20 [/tex]
x is therefore 20cmwhat is the common denominator of "-1/4" + "-2/3"
Answer: 12
Step-by-step explanation:
The 4 in “-1/4” can be multiplied by three.
Three 3 in “-2/3” can be multiplied by four.
These give you the common denominator of 12!
Don’t forget to multiply the numerator by the amount you multiplied the denominator by!
( Please help + Will mark brainliest )
Answer the question in photo.
Answer: 1/4
Step-by-step explanation:
The scale factor is the same as the ratio of the length of a side of the image to the length of the corresponding side in the preimage.
We know that A'D'=2 and AD=8, so the scale factor is 2/8 = 1/4.
Ethan’s family used 16.8 gallons of gas to drive 428.4 miles .How many miles did they drive on each gallon of gas.
Answer: 25.5 miles per gallon. 16.8 gallons x 25.5 miles = 428.4 miles
a radio tower is located 350 feet from a building. from a window in the building, a person determines that the angle of elevation to the top of the tower is 42 ∘ and that the angle of depression to the bottom of the tower is 20 ∘ . how tall is the tower? round to the nearest foot.
In linear equation, $ 442.54 tall is the tower.
What are a definition and an example of a linear equation?
A linear equation with one variable is one that contains just one variable. It has the formula Ax + B = 0, with A and B being any two real numbers and x being an ambiguous variable with only one possible value. One such linear equation in one variable is 9x + 78 = 18.Suppose A is the window, B is the top of the tower, C is the bottom of the tower, and D is the point on the tower at the same horizontal level as the window.
Find BD, DC then add these together to give this°.
For BD : AD is 350 ft, the angle CAD is 42.
So BD/350 = tan 42°.
BD = 0.9004 × 350
BD = 315.14
AD/350 = tan20°
AD = 0.364 × 350
AD = 127.4
AD + BD = 315.14 + 127.4 = $ 442.54
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an air conditioning and heating repair firm conducted a study to determine if the average outside temperature could be used to predict the cost of an electric bill for homes during the winter months in houston, texas. the resulting regression equation was: y
Finding the numeric value of the regression line, it is found that the electric bill in a month with temperature of 48 degrees is of $157.59.
How to find the numeric value of a function or of an expression?To find the numeric value of a function, we replace each instance of the variable in the function by the desired value.
In the context of this problem, the function is given as follows:
y = 227.19 - 1.45x.
Which y giving the electric bill for a month of temperature x degrees.
The temperature is of 48 degrees, hence to find the electric bill, the lone instance of x in the function is replaced by 48, hence:
y = 227.19 - 1.45(48) = $157.59.
Hence the electric bill in a month with temperature of 48 degrees is of $157.59.
What is the missing information?The regression line is missing in this problem, as is defined as follows:
y = 227.19 - 1.45x.
In which:
y is the electric bill.x is the monthly temperature.The problem asks for the electric bill in a month with temperature of 48 degrees.
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the probability of picking a blue marble out of a bag of 50 marbles is 3/25. how many marbles in the bag are not blue?
Answer:
Okay so the probability is 3 outa 25 half the amount in the bag just add 3 and 3 together (cause 25 is half of 50) you get 6 subtract that from 50 you get 44.
A student ran the Turkey Trot 5K (5 kilometers) race on Thanksgiving Day. Using the ratio 1 mile : 1.61 kilometers, which set-up would correctly convert 5 kilometers to miles
The conversion of 5 kiiometers to miles is 3.11 miles
How to convert the distance from kilometers to milesThe given parameters are
Distance covered by the students = 5 kilometers
The ratio of the distance is given as
1 mile : 1.61 kilometers
Multiply both sides of the ratio by 5
So, we have the following ratio expression
5 * 1 mile : 1.61 kilometers * 5
Evaluate the product in the above expression
So, we have the following ratio expression
5 miles : 8.05 kilometers
Divide both sides of the ratio by 1.61
So, we have the following ratio expression
5/1.61 miles : 8.05/1.61 kilometers
Evaluate the quotient in the above expression
So, we have the following ratio expression
3.11 miles : 5 kilometers
Rewrite as
5 kilometers : 3.11 miles
This means that
5 kilometers = 3.11 miles
Substitute 5 kilometers = 3.11 miles in Distance covered by the students = 5 kilometers
So, we have
Distance covered by the students = 3.11 miles
Hence, the distance covered by the students is 3.11 miles
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Identify the point corresponding to P.
P′ (−2, 0)
P′ (−4, 0)
P′ (−3, −1)
P′ (−5, −3)
Answer:
(-4,0)
ignore this line
(ANSWER AT THE BOTTOM)A rectangular container can hold 45 candles, while a cylindrical container holds 41 candles. Each rectangular container costs the company $16, while the cylindrical container costs the company $15. If the company needs to package 6,400 candles, should it use only rectangular or only cylindrical containers to minimize costs? Explain.
How many rectangular containers will be necessary to package 6,400 candles?
How many cylindrical containers will be necessary to package 6,400 candles?
Which container should the company use to minimize costs? Explain.
143,157,the rectangular containers,because it will cost the company $67 more to use the cylinder containers.
The number of rectangular containers will be necessary to package 6,400 candles is 143
The number of cylindrical containers will be necessary to package 6,400 candles is 157.
The container that would minimise cost is the rectangular container because it would $67 less to use the rectangular container.
Which container minimises costs?The first step is to determine the total cost of packing 6400 candles using the rectangular container.
Total cost = number of containers needed x cost of one rectangular container
Number of containers needed = total number of candles to be packages / number of candles the container can hold
6400 / 45 = 142.22 = 143 rectangular containers
Total cost = $16 x 143 = $2,288
The next step is to determine the total cost of packing 6400 candles using the cylindrical container.
Total cost = number of containers needed x cost of one cylindrical container
Number of containers needed = total number of candles to be packages / number of candles the container can hold
6400 / 41 = 156.1 = 157 cylindrical containers
Total cost = $15 x 157 = $2,355
Difference in costs = $2,355 - $2,288 = $67
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Use proof by contradiciton to prove that the sum of the squares of two odd integers cannot be a perfect square. HINT: you can use the fact that the sum of two odd numbers must be even without proof
Assume to contrary that the sum of the squares of two odd integers can be the square of an integer. Since, [tex]2[2(m^{2}+n^{2})+2(m+n)+1][/tex] is odd it shows that sum of the squares of two odd integers cannot be the square of an integer.
What is a square?A quadrilateral with four equal sides is called a square. There are the numerous items in our environment that have a square shape. Equal sides and internal angles that are both 90 degrees distinguish each square shape. Let's find out more about square's characteristics, mathematics, and design.
A square has four corners and is closed, two-dimensional (2D) object.
Assume to contrary that the sum of the squares of two odd integers can be the square of an integer.
Suppose that x,y,z∈Z such that [tex]x^{2} +y^{2} =z^{2}[/tex], and x and y are odd.
Let, x=2m+1 and y=2n+1.
Hence,
[tex]x^{2} +y^{2} =(2m+1)^{2} + (2n+1)^{2}[/tex]
=[tex]4m^{2}+4m+1+4n^{2}+4n+1[/tex]
=[tex]4(m^{2}+n^{2}) + 4(m+n)+2[/tex]
=[tex]2[2(m^{2}+n^{2})+2(m+n)+1][/tex]
Since, [tex]2[2(m^{2}+n^{2})+2(m+n)+1][/tex] is odd it shows that sum of the squares of two odd integers cannot be the square of an integer.
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The linear function m = 50 - 9d represents the amount m (in dollars) of money you have
left after buying d DVDs.
a. Interpret the terms and coefficient in the equation.
b. Find the domain of the function. Is the domain discrete or continuous? Explain.
c. Graph the function using its domain.
A linear equation is an algebraic equation of the form y=mx+b, where m is the slope and b is the y-intercept, and only a constant and a first-order (linear) term are included. The variables in the preceding equation are y and x, and it is occasionally referred to as a "linear equation of two variables."
How can you tell whether a domain is continuous or discrete?A domain's discreteness or continuousness can be determined by examining the function's graph. The domain is continuous if the graph is a line. The domain is discrete if the graph consists of a collection of points.
What is a discrete domain example?Private Domain
The values that will be effective for the function are distinct from one another. The maximum number of children you can have, for instance, has a defined answer. You can have 0 children, 1, 2, 3, etc., but not 2,34.
How can you determine a discrete function's domain?Discrete graphs are those in which no lines connect the points. Start by locating all the x-coordinates in order to determine the domain and range of a discrete graph. The graph's entire set of x-coordinates makes up the domain. The graph's entire range of y-coordinates is considered to be the range.
What does a discrete structure's domain mean?The domain is the collection of all possible inputs for a function. The codomain is the collection of all permitted outputs.
What is an example of discrete structures?Graphs, logical assertions, and combinations are a few examples of discrete structures. Infinite or finite discrete structures are both possible. Contrary to continuous mathematics, which works with structures whose values can span the real numbers or have other non-separable qualities, discrete mathematics deals with discrete objects.
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I'd appreciate some help here
Answer:
6.6 is the correct number
Step-by-step explanation:
The base is 2.2 inches. The height is 3 inches. So the area is 2.2 × 3 = 6.6 square inches.
pls pls help whoever gets it right gets marked brainliest
Answer:
13 units
Step-by-step explanation:
[tex]d=√((x_2-x_1)²+(y_2-y_1)²) [/tex]
[tex] \sqrt{( - 2 - ( -14)^{2} } + ( - 4 - 1) {}^{2} [/tex]
[tex] \sqrt{12 {}^{2} } + ( - 5) {}^{2} [/tex]
[tex] \sqrt{169} [/tex]
= 13 Units18. Angela cleans sneakers on the weekend to make extra money. She has completed 12
pairs of shoes, which is 20% of her total orders. How many total orders does Angela have
to clean?
The total number of orders that Angela has to clean are 60.
How to calculate the Percentage of a number?A percentage is a certain number or part of every hundred. It is a fraction with the denominator 100, and the symbol for it is "%." To determine the percentage of a number use the percentage formula to transform the problem into an equation: P% * X = YGiven:
Number of pairs of shoes cleaned by Angela = 12
Let the total number of shoes to be cleaned be x.
So,12 pairs of shoes are 20% of her total orders.
20% of x = 12
(20/100)x = 12
0.2x = 12
x = 12/ 0.2
x = 60
Therefore, Angela has to clean a total of 60 pairs of shoes.
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1. An elevator in a tall building starts at a floor of the building that is 80 meters above the ground. The elevator descends2 meters every 0.5 seconds for 4 seconds. Identify the domain and range using the following formats and then graph.Inequality:Set Notation:
Let's begin by listing out the information given to us:
The elevator starts at 80 m
The elevator descends 2 meters every 0.5 seconds for 4 seconds
The inequality is given by:
[tex]\begin{gathered} y=80-2x \\ where\colon x=every\text{ 0.5}seconds \end{gathered}[/tex]The set notation is given by:
[tex]undefined[/tex]Estimate the intercepts of the graph of the function
Answer:
x-intercept equals 5
y-intercept equals -10
Step-by-step explanation:
y-intercept: solve when x=0. y=-2|x-5|= -10
Convert 0.000 000 005 78 to scientific notation
Answer: 5.78 × 10 to the negative ninth power
Step-by-step explanation:
The price of a phone was AED 1,500.
How much will you pay for this phone, after a discount of 22% and a 6% tax?
Answer:
100-22=78
78+6=84
1500 x 84/100= 1260Dhs
Plss mark as brainliest
how do you do these problems
The required value of the function is 2
In the case of a function from one set to the other, each element of X receives exactly one element of Y.
The function's codomain and domain are respectively referred to as the sets Y and X as a whole.When a function is defined, the domain and codomain are not always explicitly specified, and one may just be aware that the domain is a subset of a bigger set without having to conduct any (perhaps difficult) computation. In mathematical analysis, "a function from X to Y" typically refers to a function that may have a valid subset of X as its domain.The given function is of the form :
g(x) = - x² - 7
Now let us find the required values.
g (-3) = - (-3)² - 7 = 2
g (-2) = - (-2)² - 7 = -3
g (1 ) = - ( -1 )² - 7 = -6
Hence the required value of the function is 2 at x = -3 .
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please give answer fast and provide explanation so I know how to do it
You need a thrust block for the riser for a
fire hydrant. The pyramidal form is 1 foot
high and 18 inches by 16 inches at the
base. How many cubic inches of concrete
will you need?
The number of cubical required are [tex]3456/n[/tex] here n is the area where it is kept.
To find the the number of blocks required, first you are suppose to know the volume of each brick and the area of the place where it is suppose to be kept. The area is not mentioned in this question because it is incomplete.
So, to proceed with it the volume of this block is L×B×H.
Given; length = 18 inches
breadth= 16 inches
and height = 1 foot = 12 inches
Thus Volume of cubical is 18× 16× 12= 3456 inches.
The number of bricks required is [tex]3456/n[/tex] here n represents the area of the place where it is supposed to be kept.
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How do you do question 7 and 8?
Answer:
7.
[tex]y = \frac{a - b \: x {}^{10} \times ln(x) }{x {}^{10} } [/tex]
8.
[tex]y = \frac{12x {}^{3} \times ln(x) - 2x {}^{4} + 1 + 4\pi {}^{2}x {}^{3} }{4x {}^{3} } [/tex]
Hey could you help me make sure these are right . Thanks so much they points are at 50 and I’ll mark brainliest
Step-by-step explanation:
your answers are right in my pov
0.3(6y + 15) = 1.8y + 4.5.
its hard
__________________________________________________________
Hello! In this question, we will be solving the given equation for the variable "y".
__________________________________________________________
Explanation:
In our question, we were given the following equation:
0.3(6y + 15) = 1.8y + 4.5To solve for our "y" variable, we will perform distributive property and simplify to get the value of "y".
__________________________________________________________
Solve:
[tex]0.3(6y + 15) = 1.8y + 4.5\\\\\text{Use the distributive property to distribute the "0.3"}\\\\1.8y+4.5=1.8y+4.5\\\\\text{Since both sides of the equal sign are equal, there will be infinite solutions}[/tex]
Proof:
[tex]\text{To prove that there are infinite solutions, we could continue to solve the}\\\text{equation:}\\\\1.8y+4.5 =1.8y+4.5 \\\\\text{Subtract 1.8y from both sides}\\\\4.5=4.5\\\\\text{Subtract 4.5 from both sides}\\\\0=0[/tex]
__________________________________________________________
Answer:
[tex]\boxed{\text{Infinite solutions}}[/tex]
__________________________________________________________
Do the ratios 6:1 and 18:3 form a proportion
Answer:
Yes.
Step-by-step explanation:
18/ 3 = 6
3 / 3 = 1
so, 6 : 1.