Algebra 1 FERP Answer Key (2016)
4
11
2. x = 41
3. x = -24
1
4. y = x  2
4
1. x = 
9.
y= x
10.
PSF: y – 5 = 7(x + 2) or y = 5 + 7(x + 2)
SIF: y = 7x + 19
SF: 7x – y = -19
PSF: y + 3 = 3(x – 1) or y = -3 + 3(x – 1)
or y – 3 = 3(x – 3) or y = 3 + 3(x – 3)
SIF: y = 3x – 6
SF: 3x – y = 6
1
y = x 1
3
y > 2x + 4
y=2
x ≥ -6
3
x≤ 
4
-3 < x < 1
-9 ≤ x ≤ -3
(5, -4)
no solution
(1, -4)
x + y = 500; 2x + 5y = 1789
237 student tickets sold, 263 adult tickets
x + y = 120; y = x + 20
50 nickels, 70 dimes
x = -6, 1
x = 3, 9
(3, -1)
(-3, -1)
1
x y  6; y   x  4
3
11.
5.
y = 3x – 6
12.
13.
14.
15.
6.
7.
y=
5
x2
4
x=5
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
8.
y = -2
Algebra 1 FERP Answer Key (2016)
29.
30.
31.
1
y  2x  4 ; y   x  1
2
2
x2
3
y  x  3
y
a. 4 2
32.
a. 2 6
33.
a.
34.
35.
36.
5 2
2
7
3x 5
y4
38.
27b 4
10ac 6
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
(9y2 + 5)(y + 2)
(x + 3)(x2 – 5)
2x(x – 5)(x – 3)
3x(x – 5)(x + 1)
(2x – 5)2
9w2z3(4w3z5 – 1 + 2wz3)
(x – 6)(x – 5)
59.
60.
61.
62.
63.
64.
x = 3 2 2
x = -1, 9
x = 2 , 15
x = 5
x = -2/5, 1
x = 0, 1/4
65.
x = 2  2 3
66.
x
67.
x = 44 3
b. 2 14
b. 45 2
b.
a. 2 x 5 x
4
x6
6x 7 y 4
37.
52.
53.
54.
55.
56.
57.
58.
3 3
3
12
b. 4 x
y9
8 x15
4 x14
9 y6
cubic polynomial
linear binomial
quadratic trinomial
2 z 3  2 z 2  3z  13
12t 4  t  8
x 2  4 x  45
3x 2  10 x  8
16 x 2  56 x  49
6 x 3  7 x 2  36 x  40
(x + 7)(x – 7)
(4x + 5)(4x – 5)
6x
1  2
2
x = -8
x = 5, 9
No solution
x = 52
x=4
D: all real numbers; R: y ≤ 4
D: x ≥ 0; R: all real numbers
25
81
V:(4, -26) AoS: x = 4
V:(-2, 1) Aos: x = -2
V:(3, 7) AoS: x = 3
V:(-8, -5) AoS: x = -8
x = -5 (double root); discriminant = 0
x = 1, 5; discriminant > 0
no real solutions; discriminant < 0
-8
56
0
Starting Height: 40 meters
Height after 6 seconds: 128.2 meters
Time to reach highest point: 2.76 sec
Highest point: 77.19 meters
Time to hit ground: 6.72 sec
68. x 
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
3  15
2
Algebra 1 FERP Answer Key (2016)
89.
90.
Starting Height: 6 feet
height after 5 seconds: 126 feet
Time to reach highest point: 1.31 sec
Highest point: 33.56 feet
Time to hit ground: 2.76 sec
y = x2 + 4x – 5
91.
y = x2 – 8x + 12
92.
93.
94.
95.
96.
97.
98.
99.
100.
Correlation
Causation
Correlation
Biased
Unbiased
Biased
30.5%
65.4%
48%