Question

What is the measure of angle 42
O 30°
O 420
O 120°
O 1389

Answer 1

42°

Explanation:

angle 3 + angle 4 = 180° because together they make a straight line. So your equation should be 23x + 7x = 180. Add the like terms and you get 30x=180. Divide by 30 on both sides to get x. now you know that x=6. angle 4 = 7x. so you would multiply 7*6 to get 42. Thus angle 4= 42°

Answer 2

42 degrees

Explanation:

<3 and <4 form a straight line so their sum is 180 degrees

<3 + <4 = 180

23x + 7x = 180

Combine like terms

30x = 180

Divide each side by 30

30x/30 =180/30

x =6

We want to find <4

<4 = 7x

= 7*6

<4 = 42 degrees