The answer is D. -15 because I am assuming that the vertical lines mean brackets, and we have to work out the brackets first (according to BIDMAS). Doing so, -6 + 2 = -4 and -4 + -11 = -15.
Angles 5 and 6 are not congruent because they are on the same line, so the answer is I
Alrighty
remember

means

and

and

for all real values of x
so

means

means

which simplifies to
1=x²+4x-5
minus 1 both sides
0=x²+4x-6
use quadratic formula or complete the square

and

2 solutions
Answer:
5+23
Step-by-step explanation:
increased by is another word for add
Answer:
10-8=2 i think
Step-by-step explanation: