Solve the inequality Zax-3<4x+5a for all possible values of the parameter a

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.

How do you determine if an ordered pair is a solution to a given equation?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]