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VARVARA [1.3K]
3 years ago
7

What is the value of y in the solution to the system of equations 5x-y=25 and x+4y=-10

Mathematics
2 answers:
Amiraneli [1.4K]3 years ago
3 0

Answer:

y=-3.571

Step-by-step explanation:

To get rid of the x's make the other x cancel out the other.

5x-y=25+(-5(x+4y=-10)=-21y=75= -3.571

yan [13]3 years ago
3 0

Answer:

x+4y =10

5x-y =25

Step-by-step explanation:

x=10-4y

5(10-4y)-y =25

50-20y-y =25

50-21y = 25

-21y = 25-50

-21y =-25

y =25/21

Substitute y =25/21 in equation 1

x + 4(25/21) = 10

x +100/84 =10

x=10-100/84

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Taking a quotient, we will see that she can make 7 bowls of cereal (and some leftover milk).

<h3>How many bowls of cereal would kathy have?</h3>

We know that for each bowl, she needs 1/2 cups of milk.

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To know how many bowls she can make, we need to take the quotient between the total that she has and the amount that she needs for each bowl:

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We can rewrite the total as:

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nexus9112 [7]
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