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podryga [215]
3 years ago
6

Express the area of this triangle as monomial.

Mathematics
1 answer:
gladu [14]3 years ago
5 0

The formula of an area of a triangle:

A=\dfrac{1}{2}bh

b - base

h - height

We have b = 8x and h = 7x. Substitute:

A=\dfrac{1}{2}(8x)(7x)=(4x)(7x)=28x^2

<h3>Answer: 28x²</h3>
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2 years ago
In parallelogram DEFG, DH = x + 5, HF = 2y, GH = 4x-3 and HE = 4y + 1. Find the values of x and y. The diagram is not drawn to s
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Rule: The diagonals of any parallelogram bisect each other. In other words, they cut each other in half.

This means DF is cut into two equal pieces: DH and HF.
Similarly, GE is cut into two equal pieces: GH and HE.

DH = HF
x+5 = 2y
x = 2y-5

GH = HE
4x-3 = 4y+1
4(x)-3 = 4y+1
4(2y-5)-3 = 4y+1 ... x has been replaced with 2y-5
8y-20-3 = 4y+1
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If y = 6, then x is
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--------------------------------------------

Answers: 
x = 7 and y = 6

5 0
3 years ago
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