The lines x= 1/4y + a and y=1/4x +b intersect at the point (1,2). what is a+b?

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

How do you find the circumfrance of a circle?

Identify the number 127 as a rational or irrational. explain