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3 years ago

15

a student answers 75% of the questions on a math exam correctly. if he answers 30 questions correctly. how many questions are on

the exam?

1 answer:

Komok [63]3 years ago

8 0

There is 40 questions on the exam

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The time it takes to travel to a destination varies inversely with the average speed. It takes two hours when the average speed

Zolol [24]

Answer:

1 hour

Step-by-step explanation:

The time it takes to travel to a destination varies inversely as its speed

T= k/S

K= TS

Time= 2 hours

Speed= 40mph

K= 2×40

= 80

Therefore if the average speed changes to 80mph then the new travel time can be calculated as follows

T= 80/80

= 1 hour

Hence the new travel time is 1 hour

3 0

3 years ago

Darius is saving money to go to a gaming summer camp. He already has $95 in the bank. His goal is to earn $900 so he can pay for

Gnesinka [82]

Answer:

23 weeks

Step-by-step explanation:

900 - 95 = 805

He only has to save up $805 now.

How many times does 35 go into 805?

35 x 23 = 805

805 ➗35 = 23

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3 years ago

1. Write a partitive division story problem for 6 divided by 3/4.

Phoenix [80]

Here is the answer to your problem

5 0

3 years ago

Read 2 more answers

Mailyn loves cookies. She can eat 32 in an hour. Her brother Juan, however, needs 3 hours to eat the same amount of cookies. How

bezimeni [28]

we know that

1) Mailyn can eat 32 cookies in an hour

1 hour is equal to 60 minutes

<u>Find how cookies eats Mailyn in one minute</u>

by proportion

$\frac{32}{60} \frac{cookies}{minutes}= \frac{x}{1} \frac{cookie}{minutes} \\\\ x=32/60\\x=0.53 \ cookies$

2) Juan needs 3 hours to eat 32 cookies

<u>Find how cookies eats Juan in one minute</u>

by proportion

$\frac{32}{180} \frac{cookies}{minutes}= \frac{x}{1} \frac{cookie}{minutes} \\\\x=32/180 \\x=0.18\ cookies$

<u>3) Find how long will it take them to eat 40 cookies together</u>

we know that

Maylin and Juan eats in one minute together ---------> (0.53+0.18)=0.71 cookies

so

by proportion

$\frac{0.71}{1} \frac{cookies}{minutes}= \frac{40}{x} \frac{cookie}{minutes} \\\\0.71*x=40\\x=56.34 \ minutes$

therefore

<u>the answer is</u>

$56.34\ minutes$

4 0

3 years ago

What does how many more mean

blsea [12.9K]

<span>how many more means greater than.</span>

6 0

3 years ago