Which equation would help determine the measure of angle D?

A. y+30+80=180
B. x-10=75
C. 80+y+30=180
D. 80=y+30

Which equation represents the partial sum of the geometric series?

Given: f(x) = 2x + 5 and g(x) = x2 and h(x) = -2x h(g(f( = x2+ vx+ x + y

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=