The value of x is 129 so the answer is D
(3x + 1) + (4x - 17) + (5x - 20) = 180
12x - 36 = 180
12x = 216
x = 18
angle a = 55
angle b = 55
angle c = 70
This is an acute isosceles triangle.
Answer:
990 square inches:)!
Step-by-step explanation:
i took the test >:).
62 students, 10 take neither English nor Math but 39 take Engl and 26 take math. This means that 62-10 = 52 take English and Math. But 39+26 = 65, minus 52 means 13 take both English and Math