Page 381 - Algebra 1

12. Multi-Step A circle with radius 10x is inscribed in a square. (43) a. Write an expression for the area of the circle.
b. Write an expression for the area of the square.
c. Form a simplified rational expression from the ratio of the two areas. Use the
circle area as the numerator.
*13. Generalize Explain why the graph of a direct variation will always go through the
(56) origin (0, 0).
*14. Multiple Choice Which equation represents a direct variation?
(56) A y=2-x B x+3=y C xy=-2 D 3y=-2x
*15. Currency The number of euros received varies directly with the number of dollars (56) exchanged. If $5.00 is exchanged for 3.65 euros, how many euros would be
received for $8.00?
16. Write the equation of the line in slope-intercept form.
(49)
-4y + x = 2 17. Write an inequality for the graph at right.
(50)
4 5
18. Camping A tent is in the shape of a triangular pyramid with a square footprint (46) (base). The tent is 6 feet high and has a volume of 128 cubic feet. What is the
length of the base?
19. Model Formulate a data set that has a mean value of 9, a median of 9, and a mode
(48) of 12.
*20. Tennis An avid tennis player is painting lines to make a court at home. The tennis
__
(51) court measures 150x + 200 feet long and 60x + 220 feet wide. How many feet did the
2x + 4 2x + 4
tennis player paint to mark the outside lines of the court?
*21. Write the equation of the line that has a slope of _1 and passes through the point (52) (2, 8) in point-slope form. 2
22. Write How is the degree of a polynomial determined? (53)
23. Multiple Choice What is the degree of a2b3 - a3b4 + 2ab?
(53) A 14 B 2 C 7 D 5
24. Make a box-and-whisker plot to display the data titled “Average High (54) Temperature in Phoenix, AZ”.
66, 70, 75, 84, 93, 103, 105, 103, 99, 88, 75, 66
25. Running A group of friends run a marathon together. Their times in minutes are
(54) shown below.
Make a box-and-whisker plot of these times and determine the outliers, if any.
366 Saxon Algebra 1
201, 240, 236, 270, 245, 252, 239, 267, 241, 229, 360