# Luis

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• Publicado : 9 de febrero de 2011

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1. If Lynn can type a page in p minutes, what piece of the page can she do in 5 minutes?
A. 5/p
B. p - 5
C. p + 5
D. p/5
E. 1- p + 5
2. If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?
A. 2 hours and 24 minutes
B. 3 hours and 12 minutes
C. 3 hours and 44 minutes
D. 4 hoursand 10 minutes
E. 4 hours and 33 minutes
R/
If Sally can paint the house in 4 hours, then in 1 hour she can paint 1/4 of the house.
If John can paint the house in 6 hours, then in 1 hour he can paint 1/6 of the house.
Let x = number of hours it would take them together to paint the house, then working together, in 1 hour they can paint 1/x of the house.

The equation is this:

3.Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost \$450?
A. \$280.90
B. \$287
C. \$292.50
D. \$306
E. \$333.89
R/
Original cost: \$450
.
15% off original cost:
450 - .15(450)
= 450(1-.15)
= 450(.85)

= \$382.5
.
382.5 - .20(382.5)
= 382.5(1-.20)
= 382.5(.80)
= \$306

4. The sales price of a car is \$12,590, which is 20% off the original price. What is the original price?
A. \$14,310.40
B. \$14,990.90
C. \$15,290.70
D. \$15,737.50
E. \$16,935.80
5. Solve the following equation for A : 2A/3 = 8 + 4A
A. -2.4
B. 2.4
C. 1.3
D. -1.3
E. 0
6. If Leah is 6 yearsolder than Sue, and John is 5 years older than Leah, and the total of their ages is 41. Then how old is Sue?
A. 8
B. 10
C. 14
D. 19
E. 21
R/
Leah = 6+x
Sue = x
John = 5+(6+x)
Total sum = 41

6+x+x+5+6+x=41
3x+17=41

3x=24
x=8

8+6=14
14+5=19

Hence, Sue is 8 years old, Leah is 14 years old and John is 19 years old.
Paul.

7. Alfred wants to invest \$4,000 at 6% simpleinterest rate for 5 years. How much interest will he receive?
A. \$240
B. \$480
C. \$720
D. \$960
E. \$1,200
8. Jim is able to sell a hand-carved statue for \$670 which was a 35% profit over his cost. How much did the statue originally cost him?
A. \$496.30
B. \$512.40
C. \$555.40
D. \$574.90
E. \$588.20
9. The city council has decided to add a 0.3% tax on motel and hotel rooms. If atraveler spends the night in a motel room that costs \$55 before taxes, how much will the city receive in taxes from him?
A. 10 cents
B. 11 cents
C. 15 cents
D. 17 cents
E. 21 cents
10. A student receives his grade report from a local community college, but the GPA is smudged. He took the following classes: a 2 hour credit art, a 3 hour credit history, a 4 hour credit science course, a3 hour credit mathematics course, and a 1 hour science lab. He received a “B” in the art class, an “A” in the history class, a “C” in the science class, a “B” in the mathematics class, and an “A” in the science lab. What was his GPA if the letter grades are based on a 4 point scale? (A=4, B=3, C=2, D=1, F=0)
A. 2.7
B. 2.8
C. 3.0
D. 3.1
E. 3.2
R/
This is a problem involving "weighted"grades. You solve it by multiplying the credit for
and dividing it into the sum of all the grade products.
.
Hard to explain, but easy to do.
.
Art .......... 2 credit hours times B (3 points) = 6 grade points
History ...... 3 credit hours times A (4 points) = 12 grade points
Science ...... 4 credithours times C (2 points) = 8 grade points
Mathematics .. 3 credit hours times B (3 points) = 9 grade points
Science Lab .. 1 credit hour times A (4 points) = 4 grade points
.
Now add up all the credit hours (2 + 3 + 4 + 3 + 1 = 13 hours)
Then add up all the grade points earned (6 + 12 + 8 + 9 + 4 = 39 grade points)
.
Finally divide the credit hours into the grade points and you have the...