Name:_________________________________ Class:_______Math 8/Advanced Math 7
Brain Builder 38
1.
Gina is playing a word game. She is
drawing from a set of tiles with a letter on
each tile. The table represents the tiles in the
set.
Use the following information to answer
Questions 3 and 4.
Roach-A-Way developed a new chemical
to destroy roaches. Ten tests were
performed with the following results:
Percent of Roaches Destroyed
99 99 99 91 90 88 71 70 69 60
3.
If you were the owner of the company,
which measure of central tendency would
you use for advertising? Why?
4.
If you were working for the pesticide
commission, which measure of central
tendency would be the best for the public to
use in evaluating the product? Why?
If Gina draws two tiles without replacing the
first tile, what is the probability the first
letter will be an “a” and the second letter will
be a “t”? Express your answer as a fraction
in simplest form.
2.
Eight cards numbered 2, 4, 5, 6, 7, 8, 9, and
10 are placed face down on a desk. If Tina
chooses 4 cards at random, what is the
probability she will choose 4 even-numbered
cards if she doesn’t replace the cards she
draws.
Name:_________________________________ Class:_______Math 8/Advanced Math 7
Brain Builder 38
5.
Calculate the Interquartile Range for the
following set of salary data:
$42,800
$15,500
$32,500
$22,750
$30,000
$24,000
$29,500
6.
7.
Thomas received his monthly paycheck
from his employer. His total pay for the
month was $2,000 before any deductions.
What percent of Thomas’ paycheck was
deducted for income taxes if $170 was
deducted for income taxes?
8.
The relationship between the cost of a
corsage and the number of flowers it
contains is shown below. Which equation
best describes the data in the table?
Complete the table below.
A.
B.
C.
D.
c=2f +2
c =3f +2
c =2f +3
c = f +5
Name:_________________________________ Class:_______Math 8/Advanced Math 7
Brain Builder 38
9.
Which equation best represents the table of
values?
11.
The Larson’s total monthly water bill, c, can
be found using the equation
c = 30 + 0.0025 g
A.
B.
C.
D.
10.
where g represents the number of gallons of
water consumed during the month. Find the
total water bill for a month during which the
Larson family used 10,000 gallons of water.
y = 3x
y= x−2
y = 2x − 5
x
y=
3
Record your answer and fill in the bubbles.
Be careful with place value.
The total cost of a bouquet of spring flowers
at a flower shop depends on the number of
flowers ordered. The vase to hold the
flowers costs $6, and each flower costs
$3.50. Which equation can be used to find c,
the total cost of a bouquet with f flowers?
A.
B.
C.
D.
c = ( 6 + 3.50 ) f
c = 6 f + 3.50
c = 6 + 3.50 f
c = 6 + 3.50 + f
12.
The diameter of a plant cell was estimated to
−6
be 3 × 10 . Write this number in standard
notation.
Name:_________________________________ Class:_______Math 8/Advanced Math 7
Brain Builder 38
16.
13.
Which of the following irrational numbers
would NOT lie between 7 and 8 on a number
line?
A.
B.
C.
D.
62
56
75
50
14. If Point A is plotted in Quadrant III, which
of the following could be the coordinates of
Point A?
A.
B.
C.
D.
15.
( −4,2 )
( −9, −2 )
( 7, −2 )
( 2,6 )
A sequence is defined by the expression
3n + 4
where n represents a number’s
2
position in the sequence. What will be the
value of the 10th term?
The number of text messages received one
day by 11 students is recorded below.
31, 34, 22, 35, 27, 25, 36, 35, 31, 29, 24
Which of the following box-and-whisker
plots best represents these data?
Name:_________________________________ Class:_______Math 8/Advanced Math 7
Brain Builder 38
17.
Danny began a weight loss program that
included a healthy diet and regular exercise.
He weighed in each week and recorded his
losses. The table below shows Danny’s
weight loss for 5 weeks.
18.
The table below shows the number of
students participating in various summer
camps.
Name:_________________________________ Class:_______Math 8/Advanced Math 7
Brain Builder 38
19.
A survey was conducted at Lee Middle School to determine the 8th grade students’ favorite sport.
The bar graph displays the data from the survey.
Which table best represents the data on the graph?
Name:_________________________________ Class:_______Math 8/Advanced Math 7
Brain Builder 38
20.
The following box-and-whisker plot was created to represent the data collected about the number
of movies attended by college students during a six-month period.
The box-and-whisker plot best represents which of the following sets of data?