r7ahMarityelilk r7ahMarityelilk

11-10-2016
Mathematics

contestada

If m∠4 = (3x)° and m∠8 = (x + 40)°, what is the measure of ∠4?

∠4 and ∠8 are vertical.

A.
20˚

B.
60˚

C.
40˚

D.
120˚

Respuesta :

ChildishTwissa ChildishTwissa

11-10-2016

It would be B. 60 degrees: 3x = x+40, minus the x from both sides of the equals sign to get 2x=40, divide by 2 from both sides and get x=20, to find L4 do 3×20 equaling 60 to be you'r answer. ^.^

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