How do you combine like terms in this expression?
10xy-4(xy+2x²y)

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Plot the intercepts to graph the equation

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.