The simplified expression (2x + 3) • x • (4x + 1) for the volume is o 8x^2 + 9x + 3.
0 8x^2 + 14x +3.
0 8x^3 + 9x^2 + 3x.
o 8x^3 + 14x^2 + 3x.

the answer is d

step-by-step explanation:

isocolese triangle

we know that the line connect a and b is the hyptonuse

so first find the hypotonuse length using the distance formula, call the length c

since it is an isocolese triangle, the lengths of the legs are the same

using pythagorean theorem,

in this case, a=b since isocolese triangle so we get

or

we can find c so we can find the distances

we know that if we draw 2 circles, each has center at a and b, and find where they intersect, we can the 2 possible locations for c

if a has center at (xa,ya) and b has center at (xb,yb), then we can solve where

and

intersect to find where they intersect

i'm not going to put an example because i have to go to class. i hope this explanation is enough

the answer is  

d.

21

i did this one. so you should get it right.