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kenny6666 [7]
3 years ago
8

Please help!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Dovator [93]3 years ago
4 0
Collect like terms:
You have 2 with mn so 9mn - 9mn =0
You also have 2 with m4n so -19m4n - 12m4n = -31m4n
Put it together:
-31m4n -8m2
So C
Let me know if you have any questions
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URGENT!! 50 POINTS FOR CORRECT ANSWER WITH EXPLANATION!!!
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Solve<br> x+y= -1<br> x - y = -7<br> using elimination.
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Find the area of the following polygon:
Masja [62]

Given:

ABCD is a quadrilateral

AC = 12, DE = 4 and FB = 5

To find:

The area of the polygon.

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AC bisects the quadrilateral into two triangles.

Area of triangle:

$A=\frac{1}{2}\times\text{base}\times\text{height}

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$A=\frac{1}{2}\times AC \times DE

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Area of triangle DAC = 24 square units.

<u>Area of triangle BAC:</u>

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Area of triangle BAC = 30 square units.

Area of polygon = Area of triangle DAC + Area of triangle BAC

                           = 24 square units + 30 square units

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The area of the polygon is 54 square units.

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