Please give me the answer I feel like crying cause cause I’m not smart

X+ y = 5 ; x - y =3 solve using linear combination

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

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c