Solve for W
-2.5 + w = 3.7
w=

7x+8y=-18, 4x-9y=-3 solve the system of equations

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.