Simplify the expression which is -3(5x-7y)

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

What does independent variable and dependent variable mean in math?

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)