I need help. The answers has to be exact so I can’t use decimals

Answer:

Slope formula is given as (y2-y1) ÷ (x2-x1) or (y1-y2) ÷ (x1-x2), where x and y are the coordinates of the points.

Slope = (-7-(-6)) ÷ (0-(-8))

= (-7+6) ÷ (0+8)

= -1/8

Answer

Options A, F, G, N

The line segments include

QR

QS

QT

RS

RT

ST

Note that the segments only have a dash on top of them and not an arrow.

Explanation

A line segment is a region of a line bounded by two different endpoints and contains all the points on the line that are between the two endpoints.

From the attached image, we can see that there is a line with infinite length (the arrows at the two endpoints indicate that this line continues till infinity), has points Q, R, S and T.

So, the line segments will be any space from one endpoint to another. They'll include

QR

QS

QT

RS

RT

ST

Note that the segments only have a dash on top of them and not an arrow.

Hope this Helps!!!

The equation of the line 4x-20y = -160 in the slope intercept form is y = x/5 + 8 .

The equation of the line in slope intercept form is written as

y = mx + c ,

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

In the question ,

the equation of the line is given

equation of line is given as 4x-20y = -160

to convert the equation in slope intercept form , we rewrite it as

20y = 4x+160

dividing both sides by 20 ,

we get

20y/20 = 4x/20 + 160/20

y = x/5 + 8

hence ,the slope intercept form is y = x/5 + 8 , where 8 is the y intercept and 1/5 is the slope .

Therefore , the equation of the line 4x-20y = -160 in the slope intercept form is y = x/5 + 8 .

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Answer:

-42/7 and 42/-7

Explanation:

The absolute value of a number is represented by:

The lines represent absolute value of a number x, and what it does is that it makes everything into a positive number.

For example |-5|=5 and |5|=5, so we always have two options with an absolute value: that it comes from a negative number or that it comes from a positive number.

In this case we have that a number with an absolute value of 42 (it could be |-42|=42 or |42|=42) divided by a number with an absolute value of 7 (it could be |-7|=7 or |7|=7) the quotient is -6.

One possible numberic equation is:

Since this meets all the above conditions

Another possible numeric equation is:

Since this too meets all the above conditions.

ANSWER

Hypotenuse: 16 ft

Leg: 4 ft

EXPLANATION

Given:

A right angle triangle with only one leg = sqrt(240) feet

Desired Outcomes:

Lengths of the leg and hypotenuse

Declaration of variables

Let x represent the length of leg

Hypotenuse = 4 times the length of leg = 4x

Apply Pythagorean theorem

Hypotenuse = 4x = 4 (4) = 16 ft

Hence, the Lengths of the leg and hypotenuse are 4 ft and 16 ft respectively.

The sectorial area of the circle is equal 31.3cm^2

The formula for the b of the sector of a circle is /360o (r2) where r is the radius of the circle and  is the angle of the sector.

Area of a Sector of Circle = (θ/360º) × πr^2, where, θ is the sector angle subtended by the arc at the center, in degrees, and 'r' is the radius of the circle.

Data;

The area of the sector can be calculated using the formula given

[tex]A = \frac{\theta }{360} * \pi r^2[/tex]

Substituting the values into the formula;

[tex]A = \frac{\theta }{360} * \pi r^2\\A = \frac{56}{360}* \pi * 8^2\\A = 31.27cm\\A = 31.3cm^2[/tex]

The area is equal 31.3cm^2

Translation:

The area of a circular sector of a circle with radius equal to 8cm and central angle equal to 56 degrees.

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As calculated by the given ratios, 36 more skiers were there than snowboarders at the local resort on Saturday.

What is ratio?

A ratio illustrates how two or more values differ in terms of size.

Ratios can be displayed in a variety of ways, including as decimals (after dividing one value by the whole), percentages (after dividing one value by the entire), and using the ":" or "/" to separate values.

As given in the question,

Ratio of Snowboarders to Skiers

On Friday: ratio is 6:2

On Saturday: 5:3

Population = 144

Now, lets calculate the number of snowboarders and skiers at Saturday:

Given ratio: 5:3

total = 5+3

total = 8

No. of skiers is:

= (3/8)(144)

= 54

No. of snowboarders is:

= (5/8)(144)

= 90

Now lets calculate the difference between no. of snowboarders and skiers:

= 90-54

= 36

Hence, there are 36 more snowboarders than skiers.

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We are given the following equation:

In the first step we will use the distributive property on the left side:

In step 2, we will add like terms on the left side using associative properties of addition and subtraction and we will subtract 20 from both sides, we get:

Solving the operations we get:

In step 3 we will add 34x to both sides, this is the inverse additive inverse:

Solving the operations:

In step 4, we divide both sides by 17, this is the division property of equality:

Solving the operations:

Answer:

See below

Step-by-step explanation:

The length of the support when Maria is to weld a support for a 23-m conveyor is 7.87 m.

From the information, Maria is to weld a support for a 23-m conveyor so that it will operate at a 20 degree angle.

Let AB = 23m

Let x = 20°

We can then use the sine rule to find the length. This will be illustrated thus:

Sin x = AC / AB

Sin 20° = AC / 23

AC = 23 × sin 20°

AC = 7.87

The length is 7.87m

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ANSWER

EXPLANATION

We want to solve the given linear equation:

To do this, divide both sides of the equation by -6 to isolate u and simplify:

That is the solution to the linear equation.

To solve the question, we will be using a Venn Diagram. Let's list down what's given first:

855 drank alcohol

657 smoked cigarettes

192 used illegal drugs

418 both drank alcohol and smoked cigarettes

109 drank alcohol and used illegal drugs

116 smoked cigarettes and used illegal drugs

88 engaged in all three

and 251 engaged in none of these

We will draw a Venn Diagram with 3 circles, one for each vice. Then we will start with the intersection of all three and the area outside of the circles (for those who do not engage in vices).

Because we know how many engaged in all 3 vices, we can deduct that number from those who belong to the intersection of 2 vices since they have already been counted in that too.

418 - 88 = 330 drank and smoked, but not used drugs

109 - 88 = 21 drank and used drugs, but not smoked

116 - 88 = 28 smoked and used drugs but not drank

Then, we subtract the numbers in each circle from the total for each vice.

855 - (330 + 88 + 21) = 416 drank only

657 - (330 + 88 + 28) = 211 smoked only

192 - (88 + 21 + 28) = 55 used drugs only

To find the total number of surveyed students, we just need to add all the numbers in the Venn Diagram.

416 + 330 + 88 + 21 + 211 + 28 + 55 + 251 = 1,400

Therefore, there were 1,400 students who were surveyed.

1) [tex]VX=ZX, \angle XVY=\angle XZW[/tex] (given)

2) [tex]\angle X=\angle X[/tex] (reflexive property)

3) [tex]\triangle VXY \equiv \triangle ZXW[/tex] (ASA)

Answer: x=-3, x=3

Step-by-step explanation:

Answer:

4-[x]=1

-4.    -4

-[x]=-3

x=3

Given:

Total number of books is, N = 20.

Number of books donated is, d = 2/5 of books.

The objective is to find the number of books donated.

Consider the number of books donated as x.

Hence, the number of books donated is 8.

To answer this question, we will use the following diagram as reference:

To determine the tangent of θ, we have to find the value of x.

To find x, we use the Pythagorean theorem and get:

Therefore:

Therefore:

Answer:

1

Step

Multiple both numerator and both denominator

2

3

4

The amount of wall surface in square feet is there to paint is: 364 square ft. While the floor area is 169.58sq ft. See the calculations below:

The square foot is an imperial measure of area and a customary unit of area in most countries. It is defined as the area of a square with one-foot sides.

The calculation for the above solution is given as:

Step I - Recall the Given Stats:

Dimensions of the room are:

12′-4″ by 13′-9″ with an 8′-0″ ceiling height has one door 3′ × 7′ and two windows 4′ square.

Let Lenght (l) = 13'9" = 13(9/12) ft = 13(3/4) = 55/4 ft.

Let Width(w) = 12'4" = 12(4/12) ft = 12(1/3)ft = 37/3 ft

Let Height h = 8'0" = 8ft.

Recall that we have a door with dimensions 3' x 7' and two windows 4'x4'

Step II - A) Surface area of the wall to be painted is:

Area of 4 walls less (area of door plus area of window)

Surface Area = 2LH + 2WH - ((3 x7) + 2(4x4))

= 2(l +w)h - (21 + 32)
= 2 ((55/4) + (37/3))8 -53

= 220 + 592/3 - 53
= 167 + 592

= (501+ 592)/3
= 1093/3

Hence,

The Surface Area to be painted is = 364.33 Sq ft.

Step III - B) The Area of the Floor = Lx W

= (55/4) x (37/3)

= 2035/12

= 169.583333333

Hence,

Area of the Floor is approximately = 169.58

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Full Question:

A room 12′-4″ by 13′-9″ with an 8′-0″ ceiling height has one door 3′ × 7′ and two windows 4′ square.

Answer the following questions. Assume there is no waste in materials, and round off your answer to the next largest unit. Show both exact and rounded figures in the blanks provided.

A. How much wall surface in square feet is there to paint?

B. What is the floor area?

where A is the first value, B the second value and x the percent

we can solve x

this is the equation

and this is the percent:

the percent is 20%

We have to reflect the triangle across the y-axis.

If we have a point P = (x,y) and we reflect it across the y-axis, we will change the x-coordinate to its opposite value and and the y-coordinate is kept the same.

The image point then is P' = (-x,y).

Then, to reflect the triangle, we have to reflect the three vertices and then join the vertices.

We can then reflect the vertices as:

Answer:

3x - 4

Step-by-step explanation:

"Difference" is a clue word that tells you to use subtraction. The other clue word is "times" but that means times, or multiplication and is pretty straight forward.

"Three times a number" means to multiply a number, but we don't know the number, so we use a variable (a letter). I put x but you could use n or c or almost any letter for the variable.

"the difference of ___ and ___" means to subtract those two things.

So we get 3x - 4

The no. of students who usually bring their own lunch is 15.

The ratio is a comparison between two or more quantities in simplest form.

Given there are 36 students in an s2a class some of them bring their own lunch and the others buy their lunch.

Assuming x students bring their own lunch hence (36 - x) students buy their lunch.

(1/5)th of the student who brings their own lunch is (1/5)×x = (x/5).

∴ x - (x/5) : (36 - x) + (x/5) = 1 : 2.  (The reduced students are added to the      

                                                                              other category).

4x/5 : 36 - 4x/5 = 1 : 2.

4x/5 : (180 - 4x)/5 = 1 : 2.

(4x/5)÷(180 - 4x)/5 = 1/2.

(4x/5)×5/(180 - 4x) = 1/2.

4x/(180 - 4x) = 1/2.

4x = (180 - 4x)/2.

8x = 180 - 4x.

12x = 180.

x = 15.

∴ 15 students usually bring their own lunch.

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well, keeping in mind that a year has 12 months, that means 6 months is 6/12 of a year, so

[tex]~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\dotfill & \$1498\\ r=rate\to 6\%\to \frac{6}{100}\dotfill &0.06\\ t=years\to \frac{6}{12}\dotfill &\frac{1}{2} \end{cases} \\\\\\ I = (1498)(0.06)(\frac{1}{2}) \implies I = 44.94[/tex]

Yes, because the ladder will reach 16 feet high

The relationship between the three sides of a right-angled triangle is explained by the Pythagoras theorem, commonly known as the Pythagorean theorem.

According to the Pythagoras theorem, the square of the hypotenuse of a triangle, which has a straight angle of 90 degrees, equals the sum of the squares of the other two sides.

Given:

Hypotenuse= 20 feet

base= 12 feet

Using Pythagoras theorem

H²= P² + B²

20² =12² +P²

P²= 400-144

P²= 256

P= 16 FEET.

Hence, Yes, because the ladder will reach 16 feet high

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The probability that a family’s first child will be born with down syndrome is 1/5000

Number of first borne babies  = 30000

Number of first borne babies having Down syndrome = 6

Probability is defined as the ratio of number of favorable outcomes to the total outcome.

Probability =  (number of favorable outcomes)/(total outcome)

We have to find the probability that a family’s first child will be born with down syndrome. So, Number of first borne babies having Down syndrome is equal to the total number of favorable outcomes and  Number of first borne babies will also be equal to total outcome. Hence we can write,

Probability = (number of favorable outcomes)/(total outcome)

Probability = 6/30000

Probability = 1/5000

So, the required probability is 1/5000.

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Answer: [tex]9x-4[/tex]

Step-by-step explanation:

Reflecting across the y-axis means [tex]f(x) \longrightarrow f(-x)[/tex].

[tex]g(x)=-9(-x)-4=9x-4[/tex]

1) To determine which is the function from the table we need to attentively look for a constant factor in the y-column.

2) As we can see from this table, the factor we can tell that goes from 64 to 16 and then 4 is 1/4. Or in decimal form 0.25. So, we can tell the factor "b" is going to be 1/4 considering this model:

3) Let's pick one point (0,4) and plug it to find the other elements:

And finally, we can tell the function is:

SOLUTION

This is a probability question that has to do with the "without replacement" scenario, because every chocolate eaten leaves the box and never returns

The probability that both pieces are milk chocolate is calculated thus:

Number of milk chocolates = 5

NUmber of dark chocolates = 5

Total number of chocolates in the box = 5+5 =10

The probability that both pieces are milk chocolate is:

The probability that both pieces are milk chocolate is:

Given:

a.) f(x) = x²

b.) g(x) = f(x) + d

c.) d = 2

To be able to complete the equation of function g(x), let's substitute the function of f(x) and d.

We get,

g(x) = f(x) + d

g(x) = x² + 2

Therefore, g(x) = x² + 2.

Answer:

10 m

Step-by-step explanation:

Area of a square

[tex]A=s^2[/tex]

where s is the side length.

If the area of the floor is 6 m²:

[tex]\begin{aligned}A&=s^2\\\implies 6&=s^2\\\sqrt{6}&=\sqrt{s^2}\\s&=\sqrt{6}\end{aligned}[/tex]

Therefore, the side length of the square is √6 m.

Perimeter of a square

[tex]P=4s[/tex]

where s is the side length.

Substitute the found value for s into the formula to find the perimeter:

[tex]\begin{aligned}P&=4s\\\implies P&=4 \cdot \sqrt{6}\\P&=4 \sqrt{6}\\P&=9.79795897...\\ P&=10 \sf \;m\;(nearest\:integer)\end{aligned}[/tex]

Therefore, the perimeter is 10 m to the nearest integer.