ANSWER CORRECTLY AND YOU WILL GET BRAINLIEST WORTH IT
Write a proportion to find how many points x a student needs to score on a test worth 80 points to get a test score of 80%

Answer:

The line is ;

4y = -x + 56

or

y = -x/4 + 14

Step-by-step explanation:

Generally, the equation of a straight line is;

y = mx + c

where m represents the slope

so for y = 4x - 6

The slope is 4

If two lines are perpendicular, the product of their slopes is -1

So for the second line, the slope will be -1/4

The equation in the point slope format will be ;

y-12 = -1/4(x-8)

y-12 = -x/4 + 2

Multiply through by 4

4y-48 = -x + 8

4y = -x + 8 + 48

4y = - x + 56

The equation of the line that passes through (8, 12) and is perpendicular to y = 4x - 6 is:

[tex]y - 12 = -\frac{1}{4} (x - 8)[/tex] (point-slope form)

or

[tex]y = -\frac{1}{4}x + 14[/tex] (slope-intercept form)

Recall:

Given:

y = 4x - 6

To write the equation of a line that passes through (8, 12) and is also perpendicular to y = 4x - 6, substitute m = -1/4 and (8, 12) into

y - b = m(x - a)

[tex]y - 12 = -\frac{1}{4} (x - 8)[/tex] (point-slope form)

Rewrite in slope-intercept form

[tex]y - 12 = -\frac{1}{4} (x - 8)\\\\y - 12 = -\frac{1}{4}x + 2\\\\y = -\frac{1}{4}x + 2 + 12\\\\y = -\frac{1}{4}x + 14[/tex](point-slope form)

Therefore, the equation of the line that passes through (8, 12) and is perpendicular to y = 4x - 6 is:

[tex]y - 12 = -\frac{1}{4} (x - 8)[/tex] (point-slope form)

or

[tex]y = -\frac{1}{4}x + 14[/tex] (slope-intercept form)

Learn more here:

https://brainly.com/question/16732089

Answer:

You keep divinding it by 2 until you can no longer divide

Answer:

Helen has $35 and Brian has $7

Step-by-step explanation:

5b + b = 42

6b = 42

/6 /6

b = 7

7(5) + 7 = 42

35 + 7 = 42

42=42

Answer:

The answer is $84

Step-by-step explanation:

hope this helps

$70×0.2=14

$70+$14=$84

Answer:

Step-by-step explanation:

$87.50 would be your answer

since you're trying to find the book cost originally you would subtract the total minus the discount to get .8

then you would divide 70/.8 to get your answer of 87.50

Answer:

D

Step-by-step explanation:

slope of a line m= rise /run= (y1-y2)/ (x1-x2) = -2+9/-2+10 =7/8

Answer:7/8

Step-by-step explanation:

Answer:

The correct answer is B

Step-by-step explanation:

I know this is the answer because I took the test and got it right.

Answer:

f= 10, g=3

Step-by-step explanation:

Hope it helps!

Answer:

7

Step-by-step explanation:

8+4=2(x-1) (Given)

12=2x-2 (Distribute and simplify)

14=2x (Addition Property Of Equality)

7=x (Division Property Of Equality)

Answer:

  5x +14y = -21

Step-by-step explanation:

One way to write the equation of a line from two points is ...

  (y2 -y1)(x -x1) -(x2 -x1)(y -y1) = 0

  (1 -(-4))(x -7) -(-7 -7)(y -(-4)) = 0

  5(x -7) +14(y +4) = 0

  5x +14y -35 +56 = 0

  5x +14y = -21 . . . standard form equation of the line

Answer:

7

Step-by-step explanation:

7x7x7

Answer:

I googled it and found 12.81 (it seems right to me,but I'm not sure)

Answer:

6,000

Step-by-step explanation:

1,000*2=2,000

63/21=3

2,000*3=6,000

Answer:

3000

Step-by-step explanation:

21 hours x 3 = 63 hours

if the bacteria doubles every 21 hours, in 63 hours it would have doubled three times. 1,000 bacteria x 3 = 3,000 bacteria

Answer:

37.5

Step-by-step explanation:

1=15 so 2=30 plus half of 15 (7.5) add, 37.5! :) Hope this helped! Have a good day! ;)

Answer:

300 can be expected to prefer spaghetti over meatloaf.

Answer:

Step-by-step explanation:

15:21 = x:420 (students that want da spaghetti:overall students)

cross multiply

15   x

21  420

6300=21x

divide by 21 on both sides

300=x

300 students out of the 420 prefer da spaghetti

Answer:

69 students were advanced and 184 were regular

Step-by-step explanation:

begining

advance 3: regular 8

after exam

advance 4 (92students) : regular 7 (92/4=23; 23*7=161 students)

So total students we have 161+92=253,

remember we have advance 3: regular 8 so

253/(3+8)=253/11=23

23*3=69, 23*8=184

Answer:

232

Step-by-step explanation:

232

D. 90 counterclockwise rotation, then reflection over x-axis

Answer:

6/8

Step-by-step explanation:

I answered this math question on edge and 100%.

Answer:

1/2

Step-by-step explanation:

Answer:

The slope of the line is -2 or m=-2

Step-by-step explanation:

Answer: I think the answer is b

Step-by-step explanation:

20% off means that there is 80% on which means you pay that 80% so you move the decimal point two spots

80.0% to .80 and multiply store a’s price of 59.99 to get 47.992 round the two in the decimal down making the total price for store a 47.99 and total price for store b 49.99 so store a is the better price by two dollars

Answer:

The error is the slope is -4 and the correct is, the slope is  [tex]-\frac{1}{4}[/tex]

Step-by-step explanation:

You must put the equation in the form of y = m x + b, where

Let us put the equation n the form above

∵ x = -4y

→ Switch the two sides

∴ -4y = x

→ Make the coefficient of y equal 1 by divide both sides by -4

∵ [tex]\frac{-4y}{-4}[/tex] = [tex]\frac{x}{-4}[/tex]

∴ y = [tex]\frac{x}{-4}[/tex]

→ Write [tex]\frac{x}{-4}[/tex] as [tex]-\frac{1}{4}[/tex] x

∴ y =  [tex]-\frac{1}{4}[/tex] x

→ Compare it by the form above

∴ m =  [tex]-\frac{1}{4}[/tex]  and b = 0

∴ The slope of the is  [tex]-\frac{1}{4}[/tex] , and the y-intercept is 0

∴ The error is the slope is -4 and the correct is the slope is  [tex]-\frac{1}{4}[/tex]

Complete Question:

Maria rode her bike for three-fifths of a mile on Monday and one-fifth of a mile on Tuesday. How many miles did she ride altogether?

Group of answer choices.

A. 1/5

B. 3/10

C. 7/5

D. 4/5

Answer:

D. 4/5

Step-by-step explanation:

Given the following data;

Distance covered on Monday, D1 = 3/5 miles

Distance covered on Tuesday, D2 = 1/5 miles

Total distance covered, Td = D1 + D2

Substituting into the equation, we have;

[tex] Td = \frac {3}{5} + \frac {1}{5}[/tex]

Lowest common denominator (LCD) = 5

[tex] Td = \frac {3 + 1}{5} [/tex]

Td = 4/5 miles.

Therefore, Maria rode 4/5 miles altogether.

Answer:

=-4x^2-11x+13

Step-by-step explanation:

Answer:

$14.40

Step-by-step explanation:

20% off of $18 is $14.4

Answer: the vaule is 4

Step-by-step explanation:

becusee its the same as the one across

Answer:

4

Step-by-step explanation:

1 x 4 / 1 = 4

Answer:  y = 2x + 14   x is the number of weeks. 14 (b) was his original performance in miles jogged per week. y is the expected performance.

Sketch attached.

Step-by-step explanation:  Given John's current performance, it is likely that he was able to jog some number of miles per week, the "b" in slope-intercept form.  To calculate:

30 = 2(8) + b

30 = 16 + b

30 - 16 = b

14 = b

Substitute into the slope intercept equation:

y = 2x + b

Answer:

3/5x - 21

Step-by-step explanation:

3/5x represents the three fifths of a number, and - 21 represents 21 less :)

Answer:

Step-by-step explanation:

1. An equation is said to be linear if the variables have power not greater than 1.

Thus, the linear equations from the list are:

B. Y = [tex]\frac{2}{3}[/tex]x + 6

C. Y = |x| + 4

D .Y = 2x - 5

2. Comparing the equations with y = mx ± c, the constant rate of change for each linear equation are:

B. [tex]\frac{2}{3}[/tex]

C. 1

D. 2

3. The constant rate of change is the gradient (slope) of a linear equation. It describes the steepness of a line from the plot of points obtained from the linear equation.