Which expression is equivalent to 7a3(6a2 + a) 2 -4a6 252a7 +84a6 + 7a5
252a +80a +7a5
O 252a7-4a8 +7a5
252a7-4a® + a2

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

umumumumum

im not sure

include a picture of the drawing in order for me to

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.