Jasmine went shopping for her birthday. She bought a few books and markers. She bought a total of 12 items. Each book was $9 and each marker was $4. She spent a total of $68. How many books did she buy?

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters