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# Algebra Jeopardy

Pre-AP Algebra - you must click "PRESENT REMOTELY" in order for the prezi to work correctly.
by

## Allison Myers

on 9 November 2015

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#### Transcript of Algebra Jeopardy

1 or 2
Variable
Equations
Systems of
equations
absolute Value
equations and
inequalities
systems of
inequalities
Matrix
operations
and Equations
100
100
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200
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300
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400
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500
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500
Vocabulary Word:
- letters or other symbols that
represent unknown numbers
or values
Variables
100
500
A stadium has 57,000 seats. Seats sell for \$21 in section A, \$18 in Section B, and \$15 in Section C. The number of seats in section A equals the total number of seats in Sections B and C. Suppose the stadium takes in \$1,071,600 from each sold-out event. How many seats does each section hold?
Section
A
has

28,500
seats.
Section
B
has
15,200
seats.
Section
C
has
13,300
seats.
The recommended daily intake (RDI) of Vitamin C is
95 mg/day
.
However, since supplement needs tend to vary from person to person, the dosage may
vary by plus or minus 35 mg
.
Write an absolute value inequality to find the dosage range.
500
60 < x < 130
Write the inequality that represents the sentence,

“Eight less than a number is greater than 62.”
x - 8 > 62
100
When given a system of inequalities, it's usually best to, if possible, isolate which
variable
? Why?
Y - so that the inequality resembles the slope-intercept form, which makes graphing easier.
100
Solve the equation:

12 - 3(2w + 1) = 5w - 3(5 + w)
Write an algebraic expression that
models the word phrase:
"the sum of the product of a number x and 9, and 15"
You currently have \$45 in your bank account. Each week you plan to deposit \$4 from your allowance and \$30 from your paycheck. How many weeks from now will you have \$315 in your bank account?
let b equal the money in the
bank after w weeks:
b = 45 + (30 + 4)w
8 weeks
Notice that your balance after 7 weeks is \$283, and after 8 weeks it’s \$317.
Since you only deposit money once a week, there is \$315 in your account only after 8 weeks.
A new outdoor recreation complex is being built in Wylie. The perimeter of the rectangular playing field is 256 yards. The length of the field is 7 yards less than double the width. What are the dimensions of the playing field?
l
= 2w - 7
w = 45, l = 83
Vocabulary:

in a 2x2 system, the
lines coincide
;
in a 3x3 system, the 3 planes intersect at a
line
.
a system that has
infinite solutions
100
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300
400
500
A laboratory technician needs to make a 27-liter batch of a 40% acid solution. How can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10% to get the desired concentration?
9L of the pure acid
solution
and
18L of the 10% acid
solution
are needed to
produce
the
27L batch of a 40% acid
solution.
Solve the system using any method:
2x – 3y + 5z = 0
x + 3y + z = 12
4y - z = 11
(2, 3, 1)
Solve the system using any method.
5x + y = 16
y = 3x

(2, 6)
200
300
400
Vocabulary:
the magnitude of a quantity, irrespective of sign;
the distance of a quantity from zero.
Solve:
2|4x-22| = 12
x = 7, x = 4
Solve & graph
on a number line:
|x + 14| > 5
x < -19
or
x > -9

The "solution" of a system of inequalities is the region where ______________________________________.
all three individual solution regions
overlap
.
Use the graph to write a matching system of inequalities.

200
300
400
200
300
Write a system of inequalities to describe the shaded figure:

y < -x + 6
y < x + 6
y > -x – 6
y > x – 6
400
Graph the solution set of the system:
-2x - y > 8
y > -8
x > -2

500

100
Vocabulary - fill in the blanks:
in an m n matrix, m and n are
called its ___________;
where
m = # of _____
and
n = # of _______
.
Dimensions
n = # of
columns
m = # of
rows
True or False?
Multiplication of matrices is
commutative.
i.e.
Is multiplying the matrices,
AxB
, necessarily the same as multiplying
BxA
?
FALSE
; multiplication of matrices is NOT commutative
i.e.

AxB
will not necessarily be the same answer as
BxA
.

a means row 2, column 3

a = 1
200
300
Write a system of equations from the matrix equation:

4x – 2y + 6z = 5
4x + 6y – 4z = 3
-3x + 6y + 7z = 4
400

AxB =

.

500
Algebra Jeopardy
P= 2
l
+ 2w
9x + 15
Consistent
&
Dependent
w = 3
y < -x
y > -8
Absolute Value
ALGEBRA JEOPARDY
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Full transcript