Ineed with number 14 and how to solve it

What value of x is in the solution set of 4x – 12 s 16 + 8x?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b