PLEASE HELP ASAP 50 POINTS

Step-by-step explanation:

Use the property of angle bisector:

Using the above and the diagram we can see:

and

Also we have:

From the first equation we find:

And from the second equation we get:

Substitute b in the third equation:

Then, find b:

10a^3+277a^2-132a-792

step-by-step explanation:

(2a+11)(5a-12)(foil)

=10a^2-24a+55a-132 =10a^2+31a-132

(10a^2+31a-132)(a+6)

=10a^3+60a^2+31a^2+186a^2-132a-792 =10a^3+277a^2-132a-792

i hope this is what you are looking for : )

70,000 + 6,000 + 800 + 30

step-by-step explanation: