Page 621 - Algebra 1

Lesson Practice
a.
(Ex 1)
b.
(Ex 1)
c.
(Ex 2)
d.
(Ex 2)
e.
(Ex 3)
f.
(Ex 3)
g.
(Ex 4)
h.
(Ex 4)
Solve and graph the inequality Solve and graph the inequality Solve and graph the inequality
Solve and graph the inequality
x < 12.
x > 19.
x + 2.8 ≤ 10.4.
Solve and graph the inequality Solve and graph the inequality Solve the inequality x + 21 ≤ 14. Solve the inequality x + 33 > 24.
1. Find the axis of symmetry for the graph of the equation y = -_1 x2 + x - 3. (89) 2
Add or subtract. 2.6rs+18r
(90) r2s2 r2s2 Factor.
4. -4y4 +8y3 +5y2 -10y (87)
Evaluate.
6.
(75)
*8.
(91)
*9.
(91)
*10.
(91)
*11.
(91)
*12.
(91)
7. 9x2 -2x+32 (75)
__ __
3. b - 6 (90) 2b + 1 b - 4
5. 3a2 -27 (83)
4x2 +6x-4
Solve and graph the inequality x < 96.
Write Explain what x ≥ 54 means on a number line.
Justify When solving an absolute-value inequality, a student gets x ≥ -5. Justify
that any value for x makes this inequality true.
Multiple Choice Which inequality is represented by the graph?
-12 -8 -4 0 4 8 12
A x <9 B x >9 C x ≤9 D x <-9
Track A runner finishes a sprint in 8.54 seconds. The timer’s accuracy is plus or minus 0.3 seconds. Solve and graph the inequality t - 8.54 ≤ 0.3.
x _
< -1.
⎪x - 10⎥ ≤ 12.
-5
⎪x + 12⎥ > 18.
Practice
Industry A machine part must be 15 ± 0.2 cm in diameter. (Ex 5)
i. Write an inequality to show the range of acceptable diameters. j. Solve the inequality to find the actual range for the diameters.
Distributed and Integrated
606
Saxon Algebra 1