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Dafna1 [17]
2 years ago
12

the difference between 2 numbers, a and b is 21. the difference of 5 times a and 2 times b is 18. What are the values of a and b

?
Mathematics
1 answer:
Nataly_w [17]2 years ago
3 0

Answer:

Step-by-step explanation:

a-b=21

5a-2b=18

Using elimination, we have

5a-5b=105

5a-2b=18

So:

3b=-87 so b=-29

Substituting, a=-8

(a,b)=(-8,-29)

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0.40 ___0.04 Please answer only if you are 100 percent sure a c =
natulia [17]

Step-by-step explanation:

0.40 ___0.04

We are given with two decimal numbers. Compare the numbers and complete the blank by < or > or =

To compare the decimals , compare each digit from left to right

0 is equal to 0

4 is greater than 0

so we can say 0.40 is greater than 0.04

0.40 > 0.04

Both decimal numbers are not equal

Answer:

0.40 > 0.04

8 0
3 years ago
A total of 611 tickets were sold for the school play. They were either adult tickets or student tickets. There were 61 more stud
Sergio039 [100]

Answer:

Adult tickets=275

Step-by-step explanation:

form 2 equations from the given info.

x+y=611

y=x+61

x being the adults and y being the students tickets

then substitute the y equation into the first equation.

x+x+61=611

2x+61=611

2x=550

x=275

and you can check by putting 275 back into the original equations :)

7 0
3 years ago
Paul made $70 shoveling snow and $25 salting driveways. He set 35% of his total earnings aside for taxes. How much did he set as
nekit [7.7K]

\huge{ \rm{Question:}}

Paul made $70 shoveling snow and $25 salting driveways. He set 35% of his total earnings aside for taxes. How much did he set aside for taxes?

\huge{ \rm{Answer:}}

33.25

Step-by-step explanation:

= 35% x (70 + 25)

= 0.35 x (70 + 25)

= 0.35 x 95

= 33.25

HOPE THIS HELPS^^

5 0
3 years ago
What is the solution to this equation?
WITCHER [35]

Answer:

A. x = 4

Step-by-step explanation:

7x-2(x-10)=40\\7x-2x+20=40\\5x+20=40\\5x=20\\x=4

8 0
3 years ago
How can you check any division problem to get your answer
aleksley [76]
To check your answer in long division multiply the divisor by the quotient to get your dividend 
6 0
4 years ago
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