What is the sum of 5/6+2/3

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

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

Which of the following is the true for f(x) = 5cos