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Vladimir [108]
3 years ago
13

AREA OF A TRAPEZOID PLEASE HELP

Mathematics
1 answer:
shepuryov [24]3 years ago
3 0
A= a+b over 2 times height
18 + 8 = 26
26 divide by 2 = 13
13 x 6 = 78
area is 78
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Answer:

First option:  3x^2-5x=-8

Second option: 2x^2=6x-5

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Step-by-step explanation:

Rewrite each equation in the form ax^2+bx+c=0 and then use the Discriminant formula for each equation. This is:

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1) For 3x^2-5x=-8:

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Then:

D=(-5)^2-4(3)(8)=-71

Since D this equation has no real solutions, but has two complex solutions.

2) For 2x^2=6x-5:

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Then:

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Since D this equation has no real solutions, but has two complex solutions.

3) For 12x=9x^2+4:

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Then:

D=(-12)^2-4(9)(4)=0

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4) For -x^2-10x=34:

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Then:

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