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Which equation would work to solve for ??

(20+5)
15
A 20t + 5 =90
B) 35t + 5 = 180
c) 20t+5= 15t
D 20t+ 20 = 180

Which equation would work to solve for ?? (20+5) 15 A 20t + 5 =90 B) 35t + 5 = 180 c-example-1
User Weisjohn
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1 Answer

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The two angles are adjacent (right next to) each other and make up the measure of the line (180°). Therefore, we can add the two angles because their sum is the measure of the straight line they lie on, which is 180° because straight lines measure 180°. Therefore angle measure 15t° added to (20t+5)° should equal 180°.

Equation:

(15t)°+(20t+5)°=180°

Simplify via the associative property of addition:

15t+20t+5=180°

35t+5=180°

Thus, the correct answer is choice B: 35t+5=180
User Kornelia
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