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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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