I need help with part A, B,C, D?
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What is the value of x when x + 7 = 21?

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?