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Serjik [45]
4 years ago
12

Mark owes his sister $15. He earned $20. He gave 1/5 of his earnings to a local charity and then he paid his sister. Does Mark h

ave enough to repay his sister the full amount? Why or why not?
Mathematics
2 answers:
ehidna [41]4 years ago
7 0

Answer:

Yes, Mark has $16 left and only has to pay his sister $15.

Step-by-step explanation:

1/5=x/20

use cross multiplication to find (x),which represents 20% of 20.

x/20=1/5 (cross multiply)

20=5x (divide by 5 on both sides)

x=4

This tells you that Mark gave $4 to the local charity.

20-4=16

Subtracting 4 from his original amount, he now has $16 left.

irina [24]4 years ago
3 0

Answer: yes

Step-by-step explanation:

Mark gave 1/5 of 20 = $4 to local charity. He has $16 left. He paid his sister $15. He still has $16 - $15 =$1 left

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It took Fred 17 days to save $36.55. At that rate, how long would it take him to save $70.95?
Vlad1618 [11]

Answer:

Fred would take 33 days to save $ 70.95.

Step-by-step explanation:

The number of days (t) is directly proportional to the quantity of money saved (c), in monetary units, then we can calculate the time taken to save $ 70.95 by simple rule of three:

t = 17\,d\,\times \frac{\$\,70.95}{\$\,36.55}

t = 33\,d

Fred would take 33 days to save $ 70.95.

4 0
3 years ago
Emerson struck out 112 times in 350 at-bats. What is the percent of strike outs per at-bat?
Natasha2012 [34]

We are told that Emerson struck out 112 times in 350 at-bats. We are asked to find the percent of strike outs per at-bat.

Let us find out 112 is what percent of 350.

\text{Percentage of strike outs per at-bat}=\frac{112}{350} \cdot 100

\text{Percentage of strike outs per at-bat}=0.32 \cdot 100

\text{Percentage of strike outs per at-bat}=32

Therefore, Emerson struck out 32% of the at-bats.

6 0
4 years ago
12
weeeeeb [17]

Answer:

2x + y = -4

Step-by-step explanation:

standard form of equation of straight line is

ax+by = c

that  is terms containing x and y should be  on LHS and constant term should be  on RHS

______________________________________________

Given equation

y + 1 = - 2x - 3

lets bring -2x on LHS ,

add 2x on lHS and RHS

y + 1  + 2x = - 2x - 3 + 2x

=> y + 1  + 2x = -3

on lHS, 1 is there which constant term lets bring it on RHS

subtract 1 from both sides

y + 1  + 2x  - 1= -3 -1

y + 2x = -4

rearranging it

2x + y = -4  (Answer)

8 0
4 years ago
I want the 17 <br> No the answer only the name of the fraction
Valentin [98]

Answer: A. 15

Explanation:

n is equal to 15 because 15 divided by 5 is 3. therefore, 3 = 15/5.

5 0
3 years ago
These numbers form an addition and subtraction fact family for 8,3,11 what is the answer​
Schach [20]

Answer:

A fact family is a set of related addition and subtraction number sentences that include the same numbers. The numbers 2, 4, and 6 can be written in two different addition sentences. The numbers 2, 4, and 6 can be written in two different subtraction sentences. These four number sentences make up a fact family.

7 0
2 years ago
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