The binary operation * is defined by a * b = ab - 2a - 2b. Evaluate 2 * ( 3 * 4 ).

-4

Step-by-step explanation:

Let's first evaluate 3 * 4.

3 * 4 = 3 × 4 - 2 × 3 - 2 × 4 = 12 - 6 - 8 = -2

Therefore, the expression becomes 2 * (-2).

2 * (-2) = 2 × (-2) - 2 × 2 - 2 × (-2) = -4 - 4 + 4 = -4

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer