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Writing Equations And Inequalities
Test Description: 7.10A The student can write an equation or an inequality to represent word problems. This also includes a review of basic conceptual understanding when solving equations.
Instructions: Answer all questions to get your test result.
1) To solve 2x + 9 = 21, what is the first step?
A
subtract 9 from each side
B
divide each side by x
C
subtract 21 from each side
D
divide each side by 2
2) At the bookstore, Dean bought a magazine for $4, and five books that all cost the same amount. He spent a total of $129. Which equation expresses how much each book cost?
A
5x - 4 = 129
B
5x + 4 = 129
C
x = 129 - 4
D
4x + 5 = 129
3) Mario had $150 to spend on 3 pairs of pants. After buying them, he had $30 left over. What equation expresses how much each pair of pants cost?
A
3x - 30 = 150
B
30x/3 = 150
C
3x + 30 = 150
D
3x = 180
4) What is the goal when solving a two-step equation?
A
to isolate the variable
B
$5x + 10\geq 20$
C
to move everything to one side of the equal sign
D
to make it a one-step equation
5) A company spends $80 to buy supplies for making bracelets. The company charges $10 per bracelet Which inequality best represents x, the number of bracelets the company needs to sell to pay for costs and earn a profit of at least $200?
A
f
B
d
C
10x + 80
D
$10x + 5 \geq 15$
6) d
A
s
B
f
C
f
D
d
7) d
A
f
B
s
C
d
D
f
8) d
A
f
B
d
C
f
D
f
9) d
A
d
B
d
C
f
D
d
10) f
A
f
B
f
C
f
D
f
*select an answer for all questions
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