PLEASE HELP!
Identify which of the following equations represent functions. Select all that apply.
A. y = 4x + 13
B. x = 5
C. x2 + y2 = 16
D. y2 = x - 6
E. y = 3x2 - x - 1

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

Yvaries inversely as x. y =12 when x=5. find y when x=4

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.