Sqrt(cos(x))*cos(200x)+sqrt(abs(x)) -0.7)*(4-x*x)^0.01, sqrt(9-x^2), -sqrt(9-x^2) from -4.5 to 4.5

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

Rewrite so the subject can be y in the formula d=m-y/y+n