Arecipe calls for 16 fluid of light

Let r = 3. what is the value of r + 58?

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

What is the value of x in the equation 2(x-4) = 4(2x + 1)?