How to get properties of rational and irrational numbers?

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?

Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?

What is the value of x in the equation 3x4y65, when y=4?