Hm so basically what the question is asking is
M<1 = 90 degrees. Since line B is perpendicular to line c, angle 5 and angle 6 are both 90 degrees (they bisect each other). Since angle 5 is 90 degrees, and corresponds to angle 1, angle 1 must also be 90 degrees.
Answer fast? What?
x + 2y = 17...Equation A
8x + 3y = 45...Equation B
Solve A for x.
x = 17 - 2y
Plug this into B to solve for y.
8(17 - 2y) + 3y = 45
136 - 16y + 3y = 45
136 - 13y = 45
-13y = 45 - 136
-13y = -91
y = -91/-13
y = 91/13
y = 7
To find y, plug x = 7 into either equation to find x.
I will use Equation A.
x + 2y = 17
x + 2(7) = 17
x + 14 = 17
x = 17 - 14
x = 3
Answer: x = 3, y = 7
2f(x) + 3 as
the function persevere all length and angle measures