College Algebra
Math 1111
Chapter 1 Test
Name _________________________________________________
1. Solve
31248xx
−=−
161688
a) - b) c) d) -
511511
2. Solve
5[32(74)]12
xxx
−−−=
1-11-1
a) b) c)
d)
3355
3. Solve 2
51
25
710
xxx
xxxx
++
−=
−−
−+
a) 26 b) -26 c) -24 d) 2
4
4. You invest $12,000 in two accounts. One investment earned 7% annual simple interest, and the other
investment earned 6.5% annual simple interest. The amount of annual interest earned was $820. How much
was invested at 7%?
a) $8,000 b) $4,000 c) $2,666.67 d) $9,333.33
5. You averaged 80 mph on a 300 mile trip and averaged 65 mph on a 200 mile trip. What was the average
speed for the entire trip?
a) 74 mph b) 70.24 mph c) 72.5 mph d) 73.24 mph
6. How many liters of a 25% nitric acid solution should be mixed with 20 liters of a 40% nitric acid
solution to produce a 31% solution?
a) 30 L b) 20 L c) 25.75 L d) 8 L
7. Simplify
2315
i
a) 1 b) -1 c) i d) -i
8. A 15 quart radiator contains a 25% concentration of antifreeze. How much of the solution must be
drained and replaced by 100% antifreeze to bring the solution up to 60%?
a) 12qts b) 4.21qts c) 8.125 qts d) 7 qts
9. Solve 2
for
360
r
A
πθ
θ
=
22
22
360
a) b) c) d)
360360360
ArArAA
rr
ππ
π π
10. Solve 2
(23)13
x
+=
313-313213-213
a) b) c) d)
2233
±±±±
