Sandra was told to find X where g(x)=7 g(x)=-2x-12
Her first step was to substitute 7 in for X. Why is that incorrect?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

The pyramid shown has a square base that is 24 centimeters on each side. the slant height is 16 centimeters. what is the lateral surface area?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?