Which pyramids with base area b and height h have equal volumes.

C and D

the volume ( V) of a pyramid is found using the formula

V = × area of base × height

calculating each of the volumes gives

(A)  V = × 10.5 × 6 = 21 in³

(B)  V = × 3.6 × 8 = 9.6 in³

(C)  V = × 4.2 × 12 = 16,8 in³

(D)  V = × 6 × 8.4 = 16.8 in³

C and D have equal volumes

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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3

step-by-step explanation: