How would i find the length of the side labeled x?

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

Give me the equations of two lines that have the same slope but are not parallel.

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?