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pav-90 [236]
3 years ago
9

Find each sum or difference (5a+9b)-(4b+2a)

Mathematics
1 answer:
valentinak56 [21]3 years ago
3 0

Answer:3a + 5b

Step-by-step explanation:

(5a+9b)-(4b+2a)

Open brackets

5a+9b-4b-2a

Collect like terms

5a-2a+9b-4b

3a+5b

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The expression that represents the surface area of the square based pyramid is 36 + 15 + 15 + 15 + 15

<h3 />

<h3>How to find the surface area of a square based pyramid?</h3>

The surface area of the pyramid is the sum of the area of the whole faces of the pyramid.

Therefore, the pyramid has 4 triangular faces and 1 square faces.

Therefore,

surface area of the pyramid = area of the square + 4(area of the triangle)

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where

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Therefore,

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