Astore buys an item for $45.00 and then adds a 100% markup to the price. how much will the item sell for in the store?

Simplify the expression 10/11(22z) + (a+5) -1

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10