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krek1111 [17]
2 years ago
12

Really need help, I’m trying to catch up in my math and get my marks back up before mid term..

Mathematics
2 answers:
Luba_88 [7]2 years ago
6 0

Answer:

a) 12x + 22   b) 17x^{2} - x

Step-by-step explanation:

Perimeter is the sum of the each side length.

The first example is a rectangle so the (4x+8) and the (2x+3) are doubled.

(4x+8) x 2 = 8x+16

(2x+3) x 2 = 4x + 6

12x+22

(6x^{2} - 12x) + (2x^{2} + x) + (9x^{2} + 10x)

combine like-terms.

17x^{2} - x

tensa zangetsu [6.8K]2 years ago
5 0

Answer:

12x + 22 for the rectangle, 17x^2 - x for the triangle

Step-by-step explanation:

The perimeter of a square/rectangle is equal to 2*width + 2*length

So for the rectangle, it would be 2*(4x + 8) + 2*(2x + 3)

This can be further simplified as 8x + 16 + 4x + 6

Which can be further simplified as 12x + 22

The perimeter of a triangle is equal to length if side one + length of side two + length of base

That would be (6x^2 - 12x) + (2x^2 + x) + (9x^2 + 10x)

Which becomes 8x^2 - 11x + (9x^2 + 10x)

17x^2 - x

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