MATHEMATICS HIGH SCHOOL

With the 20% off coupon, Alexis received a discount of $15 on her shoes. What was the regular price of her shoes before the 20% off coupon was applied? Justify your answer using equations, models, and/or words to explain your mathematical reasoning.Please answer so a middle school kid can understand

Answers

Answer 1

Answer:

Answer: 75

regular price ---- x

it said the 20% discount came to $15

so,

.2x = 15

x = 15/.2 = 75

Hope this helps :)

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( 4,?)Is on the line y=2×+3. find the other half of the coordinate

Answers

(4, ?). Let ? = b

(4, b) on line y = 2x + 3

x =4, y = b.

y = 2x + 3

b = 2*4 + 3

b = 8 + 3

b = 11.

The other half of coordinate is 11.

You do y=2x(4)+3
that equals 11
so the coordinate is (4,11)

Find the sum of the arithmetic sequence.

-10, -7, -4, -1, 2, 5, 8

Answers

Answer:

+3 every time or the total?

Or is it 18? U specify which

A mixture contains forty ounces of glycol and water and is ten percent glycol. If the mixture is to be strengthened to twenty-five percent, how much glycol is to be added?1. 4 oz
2. 8 oz
3. 10 oz

Answers

40oz glycol and water
10% is glycol
4oz is glycol
36oz is water

if glycol is to be added to make glycol 25% of all then
note: water does not change
100-25=75
water does not change so
36oz=75%
12=25%

there should be 12 oz of glycol total
4 now
12-4=8
8 oz should be added

sorry, I just wrote what I was thinking

answer is 8oz

Answer:

8 oz

Step-by-step explanation:

What is 39/40 simplified

Answers

It cannot be simplified,
but in decimal it is
0.975

what is the rate of change for the linear relationship modeled in the table? x y −1 10 1 9 3 8 5 7 -1/2 0 1/2 2

Answers

Answer:

Rate of change for the linear relationship modeled is $(-1)/(2)$

Step-by-step explanation:

As the there is a linear relationship in the points, so all these points will be on a single straight line. Hence the slope will be same throughout all the points.

We know that, the slope of the line joining (x₁, y₁) and (x₂, y₂) is,

$m=(y_2-y_1)/(x_2-x_1)$