Page 468 - Algebra 1

16. Prom Night Jamal and his friends want to rent a limousine for prom night. The (64) cost per person varies inversely with the number of people renting the limousine.
If 4 people rent the limousine, it will cost them $180 each. How much would it cost per person if 12 people rented the limousine?
Determine if the lines are parallel or perpendicular.
17. y=-_3x+8_1 andy-_2x=0
18. Data Analysis Rachel will receive an A in math for the semester if the mean of her
(66) test scores is at least 90. If her first two test scores are as shown in the table, write
an inequality for the score Rachel needs on her third test to receive an A for the semester.
19. Analyze Graph the inequalities x + 5 > 3 and x - 6 ≤ -8 on the same number line. (66) What is true about their combined solutions?
20. Multiple Choice Which graph represents the solution to x + 6 ≥ 2x - 12? (66) A B
-12-10-8 -6 -4 12 14 16 18 20 CD
-12 -10 -8 -6 -4 -20 -18 -16 -14 -12 21. Find the common solution for the system of equations given below.
(65) 2 2 3
Test
Grade
Test 1
85
Test 2
95
Test 3
?
(67)
- _1 x + y = - 2 4
-x + 4y = -8
22. Error Analysis Two students found a common solution for a system of equations.
(67) Which student is correct? Explain the error.
Student A
y = -5x - 2 6y = -30x - 12 -6y = +30x + 12 6y = -30x - 12
0=0 Solution:
y = -5x - 2
Student B
y = -5x - 2 6y = -30x - 12 -6y = +30x + 12 6y = -30x - 12
0=0 Solution:
(0, 0)
*23. Sanitation A garbage truck is on time with its collections if it maintains an average
(67) rate of y = 75x + 5. Currently, the truck is running at a rate of _1 y - 15x = 1. 5
Is the garbage truck on schedule?
Lesson 69 453