From the set {9, 11, 14}, use substitution to determine which value of x makes the equation true. 87 - 4x = 43
OA
11
OB. 9
O C.
14
OD.
none of these

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test