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Marina86 [1]
3 years ago
12

HELP PLEASE !!!! Rosana used linear combination to solve the system of equations shown. She did so by multiplying the second equ

ation by a certain number to eliminate the y-terms. What number did Rosana multiply the second equation by?
x - y= 15
0.5x + 0.2y = 25
Mathematics
2 answers:
eimsori [14]3 years ago
8 0

Answer:

She must have multiplied it by 5.

That would've given her:

x - y = 15

2.5x + y = 25

Now we can add them and the y-terms will eliminate each other. Because one is -y, and the other is positive y. -y + y = 0

Allisa [31]3 years ago
6 0
She must have multiplied it by 5.

That would've given her:

x - y = 15
2.5x + y = 25

Now we can add them and the y-terms will eliminate each other. Because one is -y, and the other is positive y. -y + y = 0.
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The value of the f(-8) from the given f(x) is 1/53.

According  to the statement

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So, For this purpose,

The given value of f(x) :

The function f(x) is

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here the value becomes 1/53.

So, The value of the f(-8) from the given f(x) is 1/53.

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2 years ago
Hello my name is juan and I new here are you able to be nice and give me a nice welcome greet
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Step-by-step explanation:

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