How do i find the angle measures without using a protractor?

Angles 2 & 3 are vertical angles and are equal. Therefore,

4x -26 = 3x +4

x = 30

Angle 2 = Angle 3 = 30 degrees

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

umumumumum

im not sure