Imagine a big solid and you cut out that one piece
the big solid is 9 by 12 by 3+4 (LWH)
so the volume is 9*12*7=756 cubic cm
the small slolid is 6 by 4 by 12 or 288 cubic cm
big-small=756-288=468 cubic cm
the volume is 468 cubic cm
All those letters have right angles in them :)
Answer:
The Answer is 3 - sqrt7
Step-by-step explanation:
2/3 + sqrt7 the starting equation
You multiply it by the conjugate which is 3 - sqrt7
= 2(3 - sqrt7) / (3 + sqrt7) (3 - sqrt7) the equation after you multiply by 3 - sqrt7
(3 + sqrt7) (3 - sqrt7) = 2
= 2(3 - sqrt7) / 2 the equation after you simplify (3 + sqrt7) (3 - sqrt7)
Divide out the 2's
= 3 - sqrt7/1 the equation after you divide out the 2's
= 3 - sqrt7 is THE ANSWER