Answer this so i can get a good math grade

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)