Answer are
A.8
B.10
C.40
D.34

A

Step-by-step explanation:

it’s gonna have to add up to 180°, and 5 x 8 - 6 = 34

89 + 57 = 146

146 + 34 = 180

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation: