3 years ago

Does anybody know how to find the volume of. a prism. please help

1 answer:

7 0

V = [1/2 x 5 x side x apothem] x height of the prism.
V=[ 1/2 x 5 x 7.1 x 5] x 15
V= 88.75 x 15
V= 1331.25

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Answer:

divide by x

Step-by-step explanation:

To answer your question, you can get from A to B by dividing by x:

$5x=3x\\\\\dfrac{5x}{x}=\dfrac{3x}{x}\qquad\text{only if $x\ne0$}\\\\5=3$

However, this is only a valid operation if x ≠ 0. In this equation, x = 0, so that division is not valid.

A better approach to the solution is to put the equation in standard form:

f(x) = 0

You can get there by subtracting 3x from both sides.

5x -3x = 3x -3x

2x = 0

Now, you can legitimately divide by 2 to find ...

x = 0 . . . . . . . . the reason why dividing by x is not allowed

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