Ignore my pencil marks need an answer asap! i need part a, b, and c.

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

What is the missing step in this proof ?

Line a is parallel to line b, m2=4x+44, and m6=6x+36. find the value of x.