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Softa [21]
3 years ago
5

5x + 5y = -10 6x + 5y = 1

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
6 0

Answer: (11, 13)

Step-by-step explanation:

5x + 5y = -10\\6x + 5y -1

o eliminate a variable use linear combinations method to add equations together- but multiply one equation by -1 first, so a variable will eliminate

-5x - 5y = 10\\6x + 56 =1\\\\x+ 0y=11\\x=11

The put 11 in for X and solve for y

5(11) + 5y = -10\\55 + 5y = -10\\5y = -65\\y=13

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mezya [45]

Answer:

First you have to divide the number by the weight of one penny (which is 2.5 grams) then take what you get and multiply by the value of one penny (and that is $0.01). After you do that you should end up with $5.376. I looked up some more information on GOOGLE and it said that they rounded this number to $5.38. <u>So your height in quarters is worth way more than your weight in pennies.</u>

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4 0
4 years ago
The sum of two numbers is 79. Three
Semmy [17]

Answer:

<u>The two numbers are 23 and 56</u>

Step-by-step explanation:

Let's say the two numbers are A and B.

We are told:

1)  A+B=79

2) 3A+5B=283

Let's take the first expression and solve for A:

A+B=79

A=79-B

Now use this value of A in the second expression:

3A+5B=283

3(79-B)+5B=283

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2B = 46

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Since B=23, we know from 1) that

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A+23=79

A = 56

<u>CHECK:</u>

Does A+B=79?  

        56+23 = 79?  <u>YES</u>

Does 3A+5B=283?

3(56)+5(23)=283

168  + 115 = 283?  <u>YES</u>

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