The perimeter of a trapezoid is 39a-7. Three sides have the following length:9a, 5a+1, and 17a-6. What is the length of the forth side?

A spinner has five sections, labeled A, B, C, D, and E. The spinner is spun 45 times, and the results are recorded in the table. What is the experimental probability of the spinner's landing on C? Round to the nearest percent, if necessary.

Alice took a standardized test. If 96% of the students scored below Alice, 2% had the same score, and 2% had a higher score, what percentile was Alice in? (a) 4'" percentile (b) 96'" percentile (c) 98'" percentile (d) 100'" percentile

20 + 7k - 12 - 5k + 8k

Joanna went school supply shopping. She spent $32.49 on notebooks and pencils. Notebooks cost $2.41 each and pencils cost $1.46 each. She bought a total of 19 notebooks and pencils. How many of each did she buy?

the length of a rectangle is five times its width. If the area of the rectangle is 245m^2, find its perimeter.

Inverse operation for 20n=300

What number is 70% of 65?

Divide £56 in a ratio of 4:3

Which is larger 117.93 or 117.859

What equals - 18 - (-5) = ?