What is the factored form of r^27-s^3

3x + 4y = 5 x- 3y = -7 solve by substitution

Iknow the answer but the calculator doesn't seem to give the right one

Aley is at the store buying some supplies for an art project. she decides to buy some colored pencils for $3.95 and a drawing tablet. the total cost of the supplies before sales tax is $6.94. what is the cost of the drawing tablet? $10.89 $2.99 $1.76 $3.01