Please help me with these two questions. If they’re correct i’ll give you brainiest.

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Ответ:

maelaysiap

05.08.2022

Mathematics

The required solution is (0.128,13.82)

Step-by-step explanation:

Consider the provided system of equation.

-2.5x+y=13.5 ......(1)

12.25x - y=-12.25 ......(2)

We need to solve the system of equation by substitution method.

Consider the equation 1.

-2.5x+y=13.5

y=13.5+2.5x ......(3)

Substitute the value of y in equation 2.

12.25x - (13.5+2.5x)=-12.25

12.25x-13.5-2.5x=-12.25

9.75x-13.5=-12.25

9.75x=-12.25+13.5

9.75x=1.25

$x\approx 0.128$

Now substitute the value of x in equation 3.

y=13.5+2.5(0.128)

$y\approx 13.82$

Hence, the required solution is (0.128, 13.82)

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