Pls, me with this two questions it is urgent. i offer to answer one of your questions and 10pts! write the formula for the perimeter of a square. tell what the variables represent. write two formulas for the perimeter of a rectangle. tell what the variables represent.

What is the equation of the graph below? y=sec(x)-4

Which of the following expressions is equal to 2x^2+8

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000