Ireally need to know how to solve this problem because i'm completely lost.

Find the total area for the regular pyramid ( follow the answer set up in the picture)

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Find the value of x for which the lines are parallel.