Number Systems
Which is the product of –0.4 and 2.5?
A. –1
B. –0.16
C. 2.1
D. -2.9
A. –1
A store sells 4 notebooks for $6. What is the cost of 10 notebooks?
A. $10
B. $12
C. $15
D. $18
C. $15
Which expression is equivalent to 6(2x – 5)?
A. 12x – 30
B. 12x + 30
C. 6x – 5
D. 12x – 5
A. 12x – 30
A spinner has 10 equal sections: 4 red, 3 blue, 3 green. What is the probability of landing on green?
A. 1/10
B. 3/10
C. 3/7
D. 7/10
B. 3/10
Solve:
-14.5 + 3/2(8 - 12) - (-6.25)
-14.25
An incomplete equation is shown below.
-6.8 + 3.2 + _____ = 0
Which expression, when placed in the blank, makes this equation true?
(A) -4.3 + 4.7
(B) -6.5 + 10.1
(C) -4.3 + (-4.7)
(D) -6.5 + (-6.7)
-6.8 + 3.2 + _ -6.5 + 10.1____ = 0
(B)
A machine produces 48 parts in 6 minutes. At this rate, how long will it take to produce 420 parts?
52.5 Minutes
Which expression is equivalent to 4(5x − 1.25) − 2(4.5x + 2) ?
(A) -4x
(B) 2x
(C) 29x -1
(D) 11x − 9
(D) 11x − 9
The ages of five pets are 2, 4, 4, 6, and 9 years. What is the mean age?
5
Simplify completely:
4(3x−7)−2(5x−9)+18
2x + 8
A diver is at –32 feet below sea level. She rises 18 feet. What is her new depth?
A. –50 ft
B. –14 ft
C. 14 ft
D. 50 ft
B. –14 ft
A school sold tickets to a musical for $9.55 per person. The musical had two performances
as described below.
• On Friday night, 180 people attended.
• On Saturday night, 15% more people attended than Friday night.
What was the total amount of money earned from tickets sold on these two nights?
(A) $1,862.25
(B) $2,723.04
(C) $1,976.85
(D) $3,695.85
(D) $3,695.85
A movie ticket costs $9.50. You have $50. Write an inequality to show how many tickets t you can buy.
t < 6
t < (or Equal) 5
0 < t < (or Equal) 5
A class recorded the number of pages they read each night:
12, 15, 12, 18, 20, 15, 15, 22, 12, 25
What is the mode, and what does it tell you about the class’s reading habits?
The class MOSTLY read 12 and 15 pages each night.
A graph shows that 9 gallons of gas cost $31.95. Find the constant of proportionality and use it to determine the cost of 14 gallons.
$49.7
The temperature was –4.5°C in the morning. By noon, it increased by 7.25°C.
What is the new temperature?
2.75 Degrees Celcuis
A jacket is discounted 35%, then the sale price is increased by 12%. The original price was $96. What is the final price?
$69.89
Solve: 3x+8=2x+20
x = 12
The test scores are:
55, 60, 62, 70, 72, 75, 80, 82, 85
Find Q1, Q3, and the IQR.
Q1: 61
Q3: 81
IQR: 81 - 61 = 20
A gym charges a $25 membership fee plus $14 per class, C. You have at most $180 to spend.
Write and solve an inequality to find how many classes you can take.
14C + 25 < (or Equal) 180
Evaluate:
|-12 + |5-17| |
0
A school has 850 students. 60% participate in clubs.
Of those, 25% participate in two or more clubs.
How many students participate in two or more clubs?
127.5 -------> 128 students participate in two or more clubs.
Solve:
7(3x−2)−4x = 5(2x+6)−18
x = 3.72
Two runners track their daily running distances:
Runner A range: 4 miles
Runner B range: 11 miles
Who is more consistent, and how do you know?
Runner A is more consistent because a smaller range means the data values are closer together.
Two data sets have the same mean but different ranges:
Set A range: 12
Set B range: 28
Which set has more variability and why?
Set B has more variability because a larger range means the data values are more spread out.