Equations in the Real World — Unit test Answers
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21
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Which equation can be used to represent the statement?Sixteen is the same as one and two-tenths times a number added to negative 8.
A
16 + 1.2 n = negative 8
B
16 + 1.2 n = 8
C
16 = 1.2 n + (negative 8)
D
16 = negative 1.2 n + 8
22
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Which method correctly solves the equation using the distributive property?
A
Negative 0.2 (x minus 4) = negative 1.7. Negative 0.2 x minus 4 = negative 1.7. Negative 0.2 x = 2.3. x = negative 11.5.
B
Negative 0.2 (x minus 4) = negative 1.7. x minus 4 = 0.34. x = 4.34.
C
Negative 0.2 (x minus 4) = negative 1.7. Negative 0.2 x + 0.8 = negative 1.7. Negative 0.2 x = negative 2.5. x = 12.5.
D
Negative 0.2 (x minus 4) = negative 1.7. Negative 0.2 x minus 0.8 = negative 1.7. Negative 0.2 x = negative 0.9. x = 4.5.
23
What property was applied to solve the equation below?
A
Addition Property of EqualityB
Subtraction Property of EqualityC
Multiplication Property of EqualityD
Division Property of Equality24
What is the value of x in the equation ?
A
–22B
–1.1C
1.1D
2225
Ms. Banerjee bought a car for $22,500. The amount she paid for her new car was twice the amount she paid for her previous car, which she bought 8 years ago. Which equation shows p, the price in dollars that she paid for her previous car?
A
22,500 = 2 p
B
2 (22,500) = p
C
22,500 = 2 p minus 8
D
2 (22,500) = p minus 8
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