Download Chapter 7 Practice Test Answer Key Pre

Chapter 7 Practice Test Answer Key
Pre-Algebra
1)
5a – 10 = 4a + 8
1)
a=18
2)
9b = 12b – 6
2)
b=2
3)
8f + 14 = (-12f) - 6
3)
f=-1
4)
4y – 36 = 2y + 42
4)
y=39
5)
3(x-4) = 18x
5)
x=
6)
5(y -8) = 3(y +24)
6)
y=56
7)
2(5n + 3) = 8n + 2(n + 3)
7)
all numbers
8)
9n – 3 = 7(n+3) + 2n
8)
no solution
9)
Find the dimensions of the rectangle:
9)
Length: 90 ft
Width: 35 ft
10) Two times the sum of three consecutive odd integers is 66. What
are the integers?
10) 9,11,13
11) Write an inequality for:
The number of students at the game was at most 70.
11) n < 70
12) For x = 6, state whether
12) false
> 9 is true or false
13) Graph the inequality on the number line:
a>4
13)
14) Graph the inequality on the number line:
m < -2
14)
For Questions 15-21, solve each inequality. Show all work!
15) b – 4 < 6.2
15)
b < 10.2
16) d – 27 > 14
16)
d > 41
17) f + (-13) < -13
17)
f<0
18) 4a > 36
18)
a>9
19)
19)
z < -250
20) - m + 5 > 25
20)
m < -40
21) -2(f + 2) > 18
21)
f < -11
22) Francisco needs at least 86 points to pass Ellen’s score. Ellen has
631 points. How many points does Francisco have?
22)
at least 545 points
(not on test)
23) The sum of an integer and the next greater integer is at most 13.
Write an inequality to find the lesser integer. Then solve for the
lesser integer.
24) Donna has picked 38 oranges. How many bags can she fill if she
puts at least 6 oranges in each bag?
23)
n + n + 1 < 13: n = 6
24)
6 bags (not on test)
25) If 8 times an integer is decreased by 12, the result is less than 44.
Find the integer.
25)
6
> 50