Perpendicular to y = 5/2x - 1 and passes through (-1, -4)

What is the difference between regular convex and concave polygons

Asporting good store is offering 30 percent off of the original price(x) of football cleats. the discount will be reduced by an another $7 before sales tax.

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?