The circle c has equation x^2+y^2+10x=20
a) show that point p=(-2,6) lies on c
b) hence find the equation of the tangent to the circle c at p

Find the volume of the described solid. the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x. a) 441b) 147c) 864d) 882

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

What is the value of the product (3-2i)(3+2i)?