When c=8, what is the value of 4c 7c and 11c ?

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

What is the frequency of the sinusoidal graph?

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.