I'll just help quickly with a couple of expressions that are equivalent.
3(m+5+9m)
If you solve it out, you get 3m+15+27m.
Simply the expression to get 30m+15.
You can regroup to make another expression 5(6m+3) which is also equal.

7 0

3 years ago

What are the surface area and volume of a regular triangular pyramid with a height of 9 cm and a slant height of 15 cm?

d1i1m1o1n [39]

I believe it is 135.
Hope this helps

3 0

4 years ago

Perform the following calculation: (–16) – (–42)

Viefleur [7K]

That equals, positive 26

6 0

3 years ago

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