A1, a1r 1, a1r 2, a1r 3, a1r 4, a1r n-1 is the general formula for the sum of a what?

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

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