If x = -1, which equation is true? A-3x + 7 = 4
B 4x - 8 = 12
C-2x + 3 = 1
D 8x + 5 = -3

Which of the following is true for the relation f(x)=2x^2+1

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=

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?