MATHEMATICS HIGH SCHOOL

By exercising regularly, Abby was able to improve her running right this year. Last year, Abby ran a mile in 12 minutes. This year she could run a mile in 10 minutes. By what percent did Abby decrease her running time?

Answers

Answer 1

Answer:

She decreased her running time at a rate of 16.67%

Step-by-step explanation:

In this question, we are asked basically to calculate the percentage decrease in Abby’s running time.

Mathematically, the percentage decrease equals: (new running time - old running time)/old running time * 100%

We input the values and proceed as follows:

Percentage decrease = (10-12)/12 * 100

-2/12 * 100/1 = -1/6 * 100 = -16.67%

Since it’s a decrease, we just simply say that her running time decrease by 16.67%

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Here is a linear equation in x: 8x- 19 =-4-7x Is 5 a solution to the equation? That is,is x=5 a solution to the equation
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Write the equation of the parabola with a focus (1,2) and directrix y = 1
Fifteen is __% of 120.
You are completing ywr math homework of 16 problems. Yo complete 75% before. dinner. How many do yw have left to complete?

Which number produces an irrational number when added to 1/2

Answers

The answer is pi aka 3.14159265359

HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Find the simplified form of the expression. Give your answer in scientific notation. (8 x 10 to the 7th power) ( 7 x 10 to the 4th power) A: 1.5 x 10 to the 12th power,
B: 5.6 x 10 to the 12th power.
C: 1.5 x 10 to the 29th power.
D: 5.6 x 10 to the 29th power.

Answers

Answer:

B: 5.6 x 10 to the 12th power.

Step-by-step explanation:

8* 10^7 * 7* 10^4

Multiply the first terms and add the powers of 10

56 * 10 ^(7+4)

56. * 10 ^11

This is not proper scientific notation

We can only have one number in front of the decimal. We have to move the decimal one place to the left, which means we add one to the exponent

5.6 * 10^ (11+1)

5.6 * 10^12

What do you call tha tool that can be used to collect data?__________

Answers

Answer:

pendrive, memory, chip

Why is the sum of a rational number and its opposite always equal to 0

Answers

because its like saying what's 4-4=0. -4 and 4 are the same distance away from zero, so if you subtract them (or add them), it'll always end up to be zero

Its just this mathematical hard question
j ÷ 5 = 2

Answers

We need to isolate j so we would multiply 5 to both sides and we would have
j = 10 so the correct answer is J = 10

lol this question not hard its very easy, the question its just telling u what is j, so basically its telling u what number divided by 5 = 2? the answer is obviously 10 cause 5 * 2 = 10. 3 more thins fyi.

1. this is elementary school work not high school

2. always read the question b4 posting so u can save points to ask real hard questions

3. I hope what I said earlier helps u out, the answer Is 10

Write 6y = x + 5 in standard form using integers. A. –x + 6y = 5
B. –6x + 6y = 30
C. -6x - 6y = 30
D. 6x - 6y = 30

Answers

I hope this helps you

-x+6y=5

Standard form is Ax+By=C, so with that knowledge, we can work with the problem to get it how we want it!

Our first step is to get x and y on the same side of the equals sign. To do that, we can subtract an x from both sides, turning 6y = x + 5 into -x +6y = 5. Lucky for us, this brings us straight to the answer, which is A) -x +6y = 5!

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What multiplies to 14 but adds to negative 4?

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