Can you help me answer this?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.

Find the volume v of the solid obtained by rotating the region bounded by the given curves about the specified line. y = x â’ 1 , y = 0, x = 5; about the x-axis v = sketch the region. sketch the solid, and a typical disk or washer.