Answer:
B
Explanation:
by a rule of angles in parallel lines we have that
angle 4 + angle 5 =180
so we have
(3x+15)+(2x-10)=180
(3+2)x+(15-10)=180
5x+5=180
5(x+1)=180
x+1=36
x=36-1
x=35
B. 35
<4 and <5 are supplementary angles and their sum is = 180°
3x + 15 + 2x - 10 = 180 add like terms
5x + 5 = 180
5x = 175
x = 35
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