Show work solve for the formula for the variable x ax+5=by-10

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2