Add/Subt. Rational Numbers
Which expression is equivalent to 1/4 - 3/5?
A. 3/5 - (-1/4)
B. 1/4 + (-3/5)
C. -1/4 - (-3/5)
D. 1/4 + 3/5
B
1/4 + (-3/5)
x y
28 21
16 12
12 9
The table shows a proportional relationship. Which equation represents the relationship?
A. y = 3/4x
B. y = 3/5x
C. y = 3x
A.
y = 3/4x
What is 75% of 15?
11.25
Simplify the expression:
2(x - 6) + 2(8)
2x + 4
What is the value of -17.36 + (-5.04)?
-22.4
An employee packs 1/3 of a large box in 3/8 hour. If the employee continues to pack boxes at the same rate, how many large boxes does the employee pack in 1 hour?
A. 1/8 box
B. 8/9 box
C. 2 2/3 boxes
D. 8 boxes
B.
8/9 box
Michael and Logan go to lunch. If their food costs $25.30 and there is an 8% tax, how much is the bill?
Round to the nearest cent.
$27.32
Using the GCF, factor:
-5x - 15
-5(x + 3)
or
5(-x - 3)
A student tracks the amount of money in a bank account using positive numbers to show the deposits and negative numbers to show the withdrawals. Which equation could represent how the student records making 5 withdrawals of $20 each?
A. -5(20) = 100
B. -5(-20) = -100
C. 5(20) = 100
D. 5(-20) = -100
D.
5(-20) = -100
Select two equations that represent a proportional relationship.
A. y = 3x + 1 B. y = 3/4x
C. x = 3y D. y = 2x
E. y = 2x -3
B. y = 3/4x
D. y = 2x
April took out a $600 loan from the bank. At the end of 5 years, she pays back the principal, plus $60 simple interest. What was the annual interest rate?
*Remember: Interest = interest rate x principal
2%
Suppose 8x + 16 ice cream cones were sold on Saturday and 7x - 9 were sold on Sunday. What is the total number of ice cream cones sold?
15x + 7
Which problem can be answered correctly by simplifying the expression -21 divided by 7?
A. A student owes a friend $7. If the student pays back the friend over 21 weeks, how much will the student need to pay each week?
B. A teacher buys 7 apples at a grocery store for a total of $21. What is the price per apple?
C. The temperature drops a total of 21 degrees in 7 hours. If the temperature changes the same amount each hour, how much does the temperature change per hour?
C. The temperature drops a total of 21 degrees in 7 hours. If the temperature changes the same amount each hour, how much does the temperature change per hour?
Jerry is reading at a rate of 2 pages every 4 minutes. Which equation shows Jerry's reading rate in pages per minute?
A. y = 2x B. y = 0.5x
C. x = 2y D. x = 0.5y
B. y = 0.5x
Jocelyn estimates that a piece of wood measures 5.5 cm. If it actually measures 5.62 cm, what is the percent error of Jocelyn's estimate? round to the nearest hundredth.
*Remember: Difference = % error x Actual
2.14%
On Saturday, Parker drove 4x - 5 miles. On Sunday, he drove 3x - 10 miles. What is the difference in miles driven?
*Remember: KAO
x + 5
What is the value of 150 + 4(- 7 1/2) - 72.25?
A. 192.25
B. 107.75
C. 74.25
D. 47.75
D.
47.75
A builder assembles 2/7 of an entire picnic table in 2/5 hour. If the builder continues to assemble the picnic table at the same rate, how long will it take the builder to assemble the entire picnic table?
A. 1 2/5 hours
B. 5/7 hour
A.
1 2/5 hour
Parker hikes 220.2 meters up a mountain. If he is 60% of the way up, how tall is the mountain?
367 meters
Simplify the expression:
-2/5(15 - 20d + 5c)
-6 + 8d - 2c