If
x + 2y = 1
X– 2y = 13
then y =

y = -3

Step-by-step explanation:

x + 2y = 1 then x = 1 - 2y

x– 2y = 13

substitute for x:

1 - 2y - 2y = 13

simplify:

-4y = 12

y = -3

x = 7

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 : )