Sat math Essentials

III.
In the third hour, James sold twice as much lemonade as Vanessa.
a.
I only
b.
II only
c.
I and II
d.
I and III
e.
I, II, and III
Answer
d.
Let’s evaluate the three statements:
Statement I:
In the first hour, Vanessa sold the most lemonade
.
In the graph, Vanessa’s bar for the first hour is highest, which means she sold the most lemonade in the
first hour. Therefore, statement I is TRUE.
Statement II:
In the second hour, Lupe didn’t sell any lemonade
.
Lemona
d
e Sol
d
Vane
ss
a
Jame
s
Lupe
0
2
4
6
8
10
12
14
16
Hour 1
Hour 2
Hour 3
Cup
s
of Lemonade Sold
H
S
 GP
A
College GP
A
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N U M B E R S A N D O P E R AT I O N S R E V I E W
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6 5

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In the second hour, there is no bar for James, which means he sold no lemonade. However, the bar for
Lupe is at 2, so Lupe sold 2 cups of lemonade. Therefore, statement II is FALSE.
Statement III:
In the third hour, James sold twice as much lemonade as Vanessa
.
In the third hour, James’s bar is at 8 and Vanessa’s bar is at 4, which means James sold twice as much
lemonade as Vanessa. Therefore, statement III is TRUE.
Answer: Only statements I and III are true.
M a t r i c e s
Matrices are rectangular arrays of numbers. Below is an example of a 2 by 2 matrix:
Review the following basic rules for performing operations on 2 by 2 matrices.
Addition