7). The area of a square is 81 square feet. How long is its side?

Equation:________________ Answer:____________

8). The length of a rectangle is equal to two times its width. The area is 128 square feet. What is the length of the short side?

Equation:________________ Answer:____________

9). The second angle of a triangle is 10 degrees larger than the first, and the third angle is 20 degrees larger than the first. What is the smallest of these 3 angles?

Equation:________________ Answer:____________

10). Here are Alicia's 8 test scores:
88 90 80 89 91 98 88 88
For her to get an "A"
(average 90 or above)
what should she score on a 9th test?

Equation: _______________________

Answer: _______

11). In Mr. Zeda’s class all the quizzes are 10 points.
Julio current list of scores is 8, 6, 9, 8, 6.
He took a 6th test but he can't remember his score,
however, his average was 7 after that last quiz.
What was the score he forgot?

Equation: ____________________________

Answer: ______



12). Extra credit: (Draw a picture)
A new runway is to be built for an airport, and needs dirt to fill it in. It will be 8500 feet long, 150 feet wide, and will need to be filled to an average height of 4 feet. How many cubic feet of dirt will be needed to build the runway?

Answer:____________