Which of the following is equal to the rational expression when x=-1 or -7? (x+1)(x-1)/(x+7)(x+1)

a. x+7/x-1
b. x-1/x+7
c. x+1/x+7

What is this inequality notation? t is less then or equal to 2

What is the lcm of 16 and 40 ? 24 and 40 ?

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