Question

I'm so stuck on this ​

Answer 1

150°

Explanation:

Find the angle

since the lines are parallel

and also because a Z angle is formed. this means :

that angle A = angle B

hence we can solve by putting:

8x - 10 = 3x + 90

make x the subject of formula

8x - 3x = 90 + 10

5x = 100

x = 100/5

x = 20°

therefore place the value of x into the equation to find B

B = 3x + 90

= 3* 20 + 90

= 60 + 90

= 150°

angle for B is 150°

Answer 2

Answer:150

Explanation:

Let's name the angle beside A: angle1

the angle beside B: angle2

angle1= angle2 because the lines are parallel.

Therefore 180-angle1=180-angle2

which is the same as A=B

So 8x-10=3x+90

5x=100

x=20

B= 3x+90

=60+90

=150