After multiplying the first, outside, inside and last terms of two binomials, the next step is A

adding an exponent.

B

adding the four products.

C

dividing the last product.

D

subtracting each term.

could you reply to this with the question so i can ?

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

m∠a is 90°

m∠b is 40°