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NCSD 8th Algebra Benchmark 2
Contributed by: Ryan
(21 + 19)4 - 2 • 8 =
3 + 9 ÷ 3 =
42 ÷ 2(16-13) =
8.4.2
Which of the following is an expression?
3x2+ 4x = -19
 3x + 5x - ¾y
8 = 7h + 6•9
6x - 9y ≤ 16 - 5x
8.4.2/3
Which of the following is an equation?
2½ + 4x = 2x - 5
5y ≥ 6x - 7y
3h • 2t - 8
16 ÷ 2 + 6x
8.4.2/3
The difference between an expression and an
equation is that
An equation has at least one variable.
An expression usually has an exponent.
An equation uses multiplication and division.
An expression does not have an equal sign.
8.4.2/3
Write the inequality for the following graph.
 X ≤ 4
 X ≥ 4
 X < 4
 X > 4
8.4.4
Identify the following inequality displayed in the graph.
X ≥ -2
X < 2
 X ≤ -2
X ≥ 2
8.4.4
Which graph represents the following inequality;
x ≥ 1
 _
_
_
_
8.4.4
Solve each question for  x.
9x+12= 39
x-21= -10
+3=12
x=
x=
x=
8.4.2
Simplify the expression, 2x+9x+3xy
The expression is in simplest form.
11x+3y
11x+3xy
15x3y
8.4.2/3
Simplify the expression, x2-10x+7x
x2-3x
x2+3x
-3x2
The expression is in simplest form
8.4.2/3
Simplify the expression, -x+10xy-2y
The expression is in simplest form
9x2-y
8xy
7y
8.4.2/3
rate at which Mr. Wilber was traveling.
Which of the following equations would represent the
Assume he was traveling at the same rate of speed.
It took Mr. Wilber 4.5 hours to travel 245 miles.
r=4.5hr x 245mi
r=4.5hr + 245mi
r=245mi / 4.5hr
r=4.5hr / 245mi
8.4.1
additional $12.50 per person for catering.
The banquet room rental is $75 and she will pay an
correct equation to solve the problem?  Find the cost.
Erica is planning a surprise birthday party for her mom.
expecting 50 guest, which of the following is the
C=50($12.50)+$75
C=50+$12.50+$75
C=
C=75($50)+$12.50
75($12.50)+$50
Cost=$
If she is
8.4.1
What is the area of the circle that has a diameter of
7 inches.  A=πr2      π≈3.14
Area=
in2
8.4.2
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