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2 years ago

8x+9y=-28 -4x=y solve the system by subsitution

Mathematics

2 answers:

bixtya [17]2 years ago

8 0

Answer:

x= 1

y = -4

Step-by-step explanation:

8x + 9y = -28

-4x = y

8x + 9(-4x) = -28

8x - 36x = -28

-28x = - 28

x = 1

y = -4(1) = -4

Zielflug [23.3K]2 years ago

6 0

Answer:

Step-by-step explanation:

8 + 9 = 17

17y = 28

28 / 17 = 1.64

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Step-by-step explanation:

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Let H represents Height and A represents Area

From the first and second statements, we have that:

$A = H^2 + 0.5$

a. Calculating Area When Height = 1.2

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$A = 1.2^2 + 0.5$

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$\sqrt{2.25} = \sqrt{H^2}$

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