Richie spent 21 7 of his football practice running laps because he was late. he ran for 30 minutes, how long was his football practice? (Please somebody help ASAP:)

If angle 2=3x +1 and angle 3=2x +4what is angle 2

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

Prove that quadrilateral is a rhombus.