Solve
5k+6=7 for x

please I need it quick and fast

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585