Lenfest has a total of 550 students enrolled. The 7th grade represents 20% of the school. How many students ARE in 7th grade? 20 110 440 550

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

Ineed to know the answer to this algebra question.

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.