Page 374 - Algebra 1

20. Leisure Time The current top score on Danielle’s favorite arcade game is
(50) 13,468 points. Write an inequality expressing all the possible scores Danielle
could score to not score lower than her top score. Graph the inequality.
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*21. Simplify the rational expression 5f , if possible. Identify any excluded values. (51) 20f 4
22. Error Analysis Students were asked to find the degree of the polynomial (53) 2x3 + 5x2 - 3x + 1. Which student is correct? Explain the error.
*23. Golf The height (in feet) of a golf ball t seconds after it is hit is given by the
(9) polynomial -16t2 + 100t. What is the height of the golf ball 3 seconds after it is
hit? 5 seconds after it is hit?
24. Find the difference of the following expressions using a vertical form:
(53) (3n3 +2n-7)-(n3 -n-2).
*25. A box-and-whisker plot is made to show the gas prices per gallon. Identify (54) the median, upper and lower quartiles, upper and lower extremes, and the
Student A
The degree is 3.
Student B
The degree is 6.
interquartile range.
Gasoline Prices
2.2 2.4 2.6 2.8 3.0 3.2
26. Probability What is the probability that a data value will fall into the interquartile (54) range?
*27. Verify Use a graphing calculator to find the solution to the linear system. Check (55) your answer.
y = - _1 x + 4 2
y = _1 x - 2 4
*28. Multiple Choice What is the solution of the linear system below? (55)
A (4, -2) C (-4, -2)
y = _3 x + 1 4
y = - _1 x - 3 4
B (-2, 4) D (4, 0)
Lesson 55 359