Page 668 - Algebra 1

*16.
(97)
Multiple Choice Which inequality represents the graph on the coordinate plane?
4
x
O
-4
-2
2
-2
-4
17.
(97)
*18.
(9 6)
*19.
(9 6)
*20.
(9 6)
*21.
(95)
22.
(95)
A y ≥ - _2 x + 2 B y ≤ - _2 x + 2 33
C y ≤ _2 x + 2 D y < - _2 x + 2 33
Football Tickets for the school football game cost five dollars for adults and
three dollars for students. In order to buy new helmets, at least $9000 worth of tickets must be sold. Write an inequality that describes the total number of tickets that must be sold in order to buy new helmets.
Error Analysis Two students find the vertex for y = x2 - 6x + 19. Which student is correct? Explain the error.
Geometry The area of a rectangle is 48 square inches. The length is three times the width. Find the width of the rectangle by finding the positive zero of the function y = 3w2 - 48.
Multi-Step The height y of a golf ball in feet is given by the function y = -16x2 + 49x. a. What is the y-intercept?
b. What does this y-intercept represent?
c. What answer does the equation give for the height of the ball after 5 seconds? d. What does that height mean?
Student A
- b = _6 = 3 _
2a 2
The vertex is (3, 0).
Student B
- b = _6 = 3 _
2a 2
32 -6(3)+19=10 The vertex is (3, 10).
Commuting Jeff traveled _1 miles for his job on Monday and _1 2x2 -4x x3 -2x2
miles for
his job on Tuesday. How many more miles did he travel on Tuesday?
4 __
Multiple Choice Add 3y + 2 + . _ y+z 2y+2z_
3y + 4 y + 4 A y+z B y+z
6y 3y - 4 __
C4mn D y-z
y
Lesson 97 653