Ask question

Ask question

All categories

3 years ago

7

A student answers 90% of the questions on a math exam correctly. If she answers 27 questions correctly, how many questions are

on the exam?

1 answer:

alexandr1967 [171]3 years ago

6 0

Answer:

30 questions

Step-by-step explanation:

You can discover this by doing 27 divided by . 90 which equals 30.

You might be interested in

For the function defined here, find f(0), f(1), and f(2) by using the graph below.

Inessa [10]

Answer:

Step-by-step explanation:

i need help

6 0

4 years ago

Why is estimating products of fractions useful

iren [92.7K]

This is useful so that you can come up with a quick answer rather then sit down with paper to solve the whole problem.

5 0

3 years ago

This is the farthest I got.. I need help.. "Write an equation that represents the line. (use exact numbers)

kirza4 [7]

So to do this, we take any 2 coordinate points and subtract them to find the slope. For this one i'll go ahead and and take (4,6) and (-2,1), then we set them up. Subtract the X coordinates from each other and the Y's from each other.

4-(-2) change the two negatives to 4+2=6

6-1=5

So 6/5 is the slope, now lets simplify to get 6/5.

Your equation is y=6/5x+3

-Seth.

P.S. It may be y=6/5x+2.5 or something, i cant tell exactly where it goes through the y intercept.

8 0

3 years ago

52/21 in its simplest form as a mixed number

Sliva [168]

Answer:

$2\frac{10}{21}$

Step-by-step explanation:

1. find out how many times 21 can go into 52 (answer- 2 times)

2. find the remainder (answer- 10)

3. put the remainder over 21 (10/21)

4. make it a mixed number (2 10/21)

7 0

4 years ago

Hannah earned $1536 in 8 years on an investment at a 4% annual simple interest rate. How much was Hannah’s investment? $4800 $30

Nonamiya [84]

Simple interest calculates interest on initial amount only. The investment by Hannah was : Option A: $4800

<h3>How to calculate simple interest amount if rate of interest is R% annually?</h3>

Suppose that the initial amount of investment is P

And the rate of simple interest is R% annually,

And the time of investment is T years.

Then, the amount of simple interest is calculated as:

$I = \dfrac{P \times R \times T}{100}$

For the given case, let the initial investment Hannah made was of $P

Then, the time of investment is T = 8 years, R% = 4%, and given that Hannah earned interest I = $1536

Putting values in the above formula, we get;

$I = \dfrac{P \times R \times T}{100}\\\\1536 = \dfrac{P \times 8 \times 4}{100}\\\\P = \dfrac{153600}{32} = 4800$

Thus,

The investment by Hannah was : Option A: $4800

Learn more about simple interest here:

brainly.com/question/5319581

5 0

3 years ago