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7th Grade Math Review 3/18-3/19 Flashcards | StudBud
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7th Grade Math Review 3/18-3/19
7th Grade Math Review 3/18-3/19
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Answers
1
The entire collection of items that is the focus of concern
Sample
Population
Probability
Random Sample
2
A tire was half full. It took an air compressor 3.5 seconds to fill it up. How long would it take to fill an empty tire?
4 seconds
8 seconds
7 seconds
3.5 seconds
3
True or False: 6 is a solution to the inequality 5
x
≤ 25 ?
False
True
4
To state in advance on the basis of observation, experience or scientific reason
Sample
Estimate
Infer
Prediction
5
What is 12% of 36.51 ?
48.51
4.38
6
A selection chosen purely by chance with no predictability
Probability
Sample
Random sample
Population
7
The equation 34.79=k7 shows that buying 7 bags of apples would cost $34.79. How much does one bag cost?
$11.35
$5.08
$4.97
$1.97
8
10 - 4%
9.83
1.76
4.91
9.60
9
Keisha is paid $9 per hour. She worked 8 hours. She gave her mother 1/4 of her earnings. How much does Keisha have left?
$54
$108
$18
$72
10
What is 4% of 8.88 ?
0.83
12.88
0.36
0.44
11
Simplify the expression. 8\left(5x-10\right)
40x-80
40x+80
4x+16
16x+30
12
Rewrite the expression in its simplest form. \left(\frac{2}{3}w+10\right)-\left(\frac{2}{6}w+5\right)
\frac{1}{3}w+5
-w+5
-\frac{3}{5}w-33
\frac{-1}{2}w-2
13
An event that will probably not happen. An outcome with a probability between 0 and 0.5
Unlikely event
Likely event
14
\frac{x}{70}=\frac{10}{100} Solve for x.
x = 10
x = 17
x = 7
x = 1
15
An event that is most likely to happen
Unlikely
Likely
16
2-12\%
1.76
-24
-10
1.36
17
Simplify the expression. -2\left(-6x+2\right)
-x+8
4x+16
12x-4
-4x-15
18
Expand this expression: \frac{2}{4}\left(\frac{1}{2}b-\frac{1}{4}\right)
\frac{1}{2}b-1
\frac{3}{6}b-\frac{3}{8}
\frac{3}{10}b+\frac{3}{15}
\frac{2}{8}b-\frac{2}{16}
19
Which expression is equivalent to -4(x+6) ?
-24x
-4x - 24
-4x + 6
x - 24
20
Emily's hair was 40 cm long. Over summer though she cut off 14%. How long was her hair after the haircut?
54 cm
26 cm
45.6 cm
34.4 cm
21
A poll is taken from 100 seniors in a high school where the senior class has 575 students.
Population
Sample
22
41 + 4%
29.91
42.64
39.96
45.00
23
Find the median of 20,30,40,50,60
1
5
50
40
24
\frac{x}{60}=\frac{5}{100} Solve for
x
.
x = 10
x = 17
x = 3
x = 6
25
Which expression is equivalent to -8.15-(-8.97)?
8.15 - 8.97
-8.15 + 8.97
8.15 + 8.97
-8.15 + (-8.97)
26
A small bag of flour weighed 10 ounces. A large bag was 6% heavier. How much does the large bag weigh?
10.6 oz
6.2 ounces
4 ounces
16 oz
27
Solve.
98.31
5
39.45
131.72
28
Rewrite the expression in its simplest form. \left(\frac{4}{20}r-19\right)-\left(\frac{4}{5}r+14\right)
r+5
\frac{1}{3}r-4
\frac{1}{3}r+5
-\frac{4}{5}r-33
29
If a cat eats 4 pounds of food in 5 days, how many pounds will it eat in 60 days?
72
12
50
48
30
What is the mode in the set of data? 2,2,2,4,4,5,6,6,6,7
2, 4, and 6
2 and 6
6
2
31
The science of collecting, organizing, representing and interpreting data
Science
Economics
Statistics
Math
32
To find a number close to an exact amount
Sample
Prediction
Estimate
Infer
33
What is 11% of 2.85 ?
0.36
0.31
3.07
4.38
34
A plant was 35 centimeters tall. After a month it had grown 13% taller. How tall was the plant after one month?
30.45 cm
39.55 cm
34.86 cm
64.2 cm
35
Simplify the expression. 4x-5
-9
4x-5
9
5x+4
36
36 + 11%
39.96
13.35
9.6
9.83
37
Jaxon bought a shirt that was originally $32. He had a coupon for 25% off. How much did he pay for the shirt before tax?
$7
$24
$57
$8
38
Any subset of a population
Sample
Random sample
Probability
Population
39
Josh surveyed every 5th person who walked into the cafeteria. Is this a random sample?
Yes
No
40
While working at a pizza place, TJ asks every customer if they are satisfied with the service. Is this a biased sample?
Yes
No
41
Simplify the expression. -8\left(-8x+10\right)
10
64x-80
-10x+4
-16x-18
42
Rewrite the expression in its simplest form. \left(\frac{2}{3}x-7\right)-\left(\frac{5}{15}x-3\right)
\frac{1}{3}x-33
\frac{1}{7}x+17
\frac{1}{3}x-4
x+5
43
\frac{\frac{2}{5}}{\frac{3}{7}} Solve.
\frac{15}{14}
\frac{14}{15}
\frac{10}{21}
\frac{7}{10}
44
Read the question below.
\frac{1}{6} hour
3 hours
\frac{1}{2} hour
1 \frac{1}{2} hours
45
A video game was $42. This weekend the game will be marked 17% off. How much is the game this weekend?
$34.86
$12.00
$25
$49.14
46
Which scenario would produce the
least
biased results?
asking fans at a baseball game who their favorite baseball team is
asking shoppers at a store where their favorite place to shop is
asking athletes at a gym what their favorite TV show is
asking students in a college libraey what their favorite college team is
47
A printing machine printed 570 pages in 3 minutes. How much would it have printed in 6 minutes?
1710
716
1140
234
48
_____________ is a part of a group being surveyed.
Statistic
Quartile
Population
Sample
49
7th graders will conduct a survey for whereto go on a field trip. Which method will result in the
least
biased decision?
randomly choose some 7th graders to select a location
ask all 7th grade teachers and admin for a location
ask the student council to choose a location
randomly ask 8th grade students who went on a field trip last year
