I want to know how many students at West Point take the bus. I ask every student in the seventh grade if they take the bus and record my results. This is an example of:
A) Unbiased Sample
B) Biased Sample
C) Being fair
D) A lot of work
Biased sample because I am only talking with seventh graders. I should take samples from all grade levels.
100
Mary buys a watch for a sale price of $42. The price was 20% off the original price. Which expression computes the original price of the watch?
A) $42 × 0.20
B) $42 × (1- 0.20)
C) $42 ÷ (1 - 0.20)
D) $42 ÷ 0.20
C.
200
11 + ( 3 x (6+5) ^2 ) + 8
382
200
Simplify the expression:
-4(m - p) - 33p - 42m
-46m - 29p
200
If the circumference of a circle is 12.56 inches, what is the diameter?
C= pi* diameter
12.56 = 3.14d
d= 4
200
Mr. McCleery and Ms. James are playing a game. Ms. James gets to roll a number cube until she lands on 3. When she lands on 3, Mr. McCleery gets to roll the number cube. Is this an independent or dependent event?
Dependent! Because Mr. McCleerys turn depends on Ms. James landing on 3
200
George found out that 36 students in the 7th grade do NOT have pets. There are 180 students in the seventh grade. What is the ratio of students that have pets to students in the seventh grade?
A) 36:18
B) 1:5
C) 4:5
D) 1:4
C
180-36 = 144 students have pets
144:180 = 4/5
300
Write 1/9 as a decimal and a percent
.1111 & 11.1%
300
Solve for x:
2/3x - 3 = 45
x = 72
300
What is the area of a circle with a diameter of 14m? Use 3.14 for pi.
A= (7m)(7m)(3.14)
A= 153.86 meters squared
300
What is the probability of me rolling a number greater than 4 on a number cube and spinning an even number on a spinner with sections numbered 1-7?
1/3 * 3/7
= 1/7
300
The perimeter of a kitchen table is represented by the equation: 2l + 2w = 40
If the width of the table is 8 feet, what is the length?
A) 12 feet
B) 14 feet
C) 6 feet
D) 8 feet
A
length = 12 feet
400
(-0.8)(-7.2)(-1)
-5.76
400
What is the value of the expression when x = 7 and y = -6:
1/2y - x
-10
400
A can of soda has a height of 14cm and a radius of 3cm. What is the volume of the cylinder? Use 3.14 for pi.
V = pi*r^2*h
V = (3.14)(3)(3)(14)
V=395.64 centimeters cubed
400
There's eight cards numbered 1-8. What's the probability of picking a 7, not replacing it, then picking an even number?
1/8 * 4/7 = 4/56
=1/14
400
The ordered pair (-4, -5) is found in which quadrant on a coordinate graph?
A)Quadrant 1
B)Quadrant 2
C)Quadrant 3
D)Quadrant 4
C. Quadrant 3
500
3.98 - 6
-2.02
500
Solve for x:
7/2 x - 2 = 28 - 4x
x= 4
500
A rectangular prism has a length of 4 feet, a width of 7 feet, and a height of 9 feet. What is the surface area of the prism?
S.A. = 2lw + 2lh + 2wh
= 254 feet squared
500
The blood groups of 200 people is distributed as follows: 50 have type A blood, 65 have B blood type, 70 have O blood type and 15 have type AB blood. If a person from this group is selected at random, what is the probability that this person has O blood type? Write your answer as a percent.
70/200 = 35%
500
A book club reads mystery and romance novels for the month of April. If 4/11 of the books are mystery books, what is the ratio of mystery to romance novels?
A) 4:11
B) 11:4
C) 7:4
D) 4:7