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Equations
Equations
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Unit 3
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
An expression is a mathematical statement that proves two expressions are equivalent.
True
False
2
All whole numbers are rational.
True
False
3
Solve the equation.
-52
all real numbers
no solution
52
4
An equation with infinitely many solutions means only one value will make the equation true.
True
False
5
Which of the following equations has one solution?
c + 2 = 2 + c
c + 2 = - 2 + c
c = -c + 2
c - c = 2
6
Your class earned $110 Saturday washing cars. This is 1/4 of the money needed for the class trip. How much is the trip?
$27.50
$440.00
$106.00
$114.00
7
Some integers are irrational.
False
True
8
Which of the following equations has no solution?
-5 + 14x = 7(2x) - 5
-6x + 1 = -3(2x +1) + x
-9x + 2 = -3(3x + 2)
4x - 4 = -4(-x + 1)
9
Joey and Lacey bought the same number of lollipops at the store. James bought 8 for a total of 28. How many did Joey buy
2
10
5
2x = 20
10
10y + 7 - 4y = -5 + 6y + 22 has no solution
False
True
11
All expressions can be solved.
False
True
12
If 4x = 28, find the value of 29 - 5x
-1
6
-6
1
13
3(x + 4) = 12 + 3x
x = 5
all real numbers
x = 0
no solution
14
An equation is a mathematical statement containing letters numbers and operations.
False
True
15
k / 1.6 = 13
k = 20.8
k = 11.4
k = 8.125
k = 0.123
16
Which of the following equations has exactly one solution?
5x + 3 = -2(2x +3)
-7x + 2 = -3(x - 3) - 4x -7
3(4x + 2) - 9 = 12x -3
14x = 7(2x + 2)
17
-2m + 3 + 7m = - 12
m = -1.8
m = -15
m = 1
m = -3
18
x - 12 = -22
x = 10
x = -10
y = -10
x = -34
19
The inverse of multiply by 6 is add 6
False
True
20
An equation with no solution means only one value can make the statement true?
False
True
21
2/5 + a/2 = 4/5 + 2a
a = - 4/15
a = 4/15
a = - 4/5
a = 4/5
22
Twenty four more than 3 times a number is the same as 18 subtracted from 2 times the number.
24 + 3x = - 18 + 2x
24 + 3x = 18 - 2x
3x - 2x = -24 - 18
-3x + 24 = - 18 - 2x
23
7(x-2) = 7x + 14
infinite solutions
one solution
imaginary
no solution
24
1/2m = -5/2
m = -5
m= 3
m = 2
m = -2
25
2 + x/2 + 3x/8 = 16
x = 16
x = 24
x = 12 1/4
x = 5