Tony spent $11.52 for some pens that were on sale for $.72 each how many pens did tony bye

Solve the system of equations. y= 2x y= x^2 - 15

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

00 points ! missy’s rotation maps point k(17, –12) to k’(12, 17). which describes the rotation? 270° counterclockwise rotation 90° counterclockwise rotation 90° clockwise rotation 180° rotation