AnswersSS-Math 7Writing Equations

Writing Equations Answers

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Which equation accurately represents this statement? Select three options.Negative 3 less than 4.9 times a number, x, is the same as 12.8.

A
Negative 3 minus 4.9 x = 12.8
Option A
B
4.9 x minus (negative 3) = 12.8
Option B
C
3 + 4.9 x = 12.8
Option C
D
(4.9 minus 3) x = 12.8
Option D
E
12.8 = 4.9 x + 3
Option E
4

Yuri’s sister Karina is 12 years old. In the equation below, y represents Yuri’s age in years.Which statement accurately relates their ages?

Question illustration
A
Yuri is 3 years younger than twice Karina’s age.
B
Yuri is 2 years younger than triple Karina’s age
C
Karina is 3 years younger than twice Yuri’s age.
D
Karina is 2 years younger than triple Yuri’s age.
6

The amount Cami raised during last year’s charity walk, $45.50, is of the amount she raised this year. Which equation represents n, the number of dollars she raised this year?

Question illustration
A
45.50 (StartFraction 7 over 10 EndFraction) = n
Option A
B
45.50 = 0.7 n
Option B
C
45.50 + n = StartFraction 7 over 10 EndFraction
Option C
D
45.50 = 0.7 + n
Option D
7

At the corner store, Nico bought 5 pencils for $0.10 each and 3 pens for $0.50 each. He used t to represent the sales tax, in dollars, that he also paid. He paid a total of $2.12, including tax. Nico wrote this equation to represent what he paid. What errors, if any, did he make?5(0.10) + 3(0.50) - t = 2.12

A
He should have multiplied 0.10 by 3 instead of 5.
B
He should have multiplied 0.50 by 5 instead of 3.
C
He should have added t instead of subtracting t.
D
He should have multiplied by t instead of subtracting t.
9

A taxi driver wrote a formula to represent the mileage and fee for his last customer. He wrote the equation , where m represents the number of miles traveled.Which statement shows the meaning of the driver’s equation? Select two options.

Question illustration
A
Three dollars added to $0.50 is the same as $9.50.
B
Three dollars plus $0.50 times the number of miles is equal to nine dollars and fifty cents.
C
Three dollars more than the quotient of $0.50 and the number of miles is nine dollars and fifty cents.
D
The product of the number of miles and the sum of $3 and $0.50 is equal to $9.50.
E
The sum of three dollars and the product of 50 cents times the number of miles is nine dollars and fifty cents.
10

Which shows one way the equation can be represented in words?

Question illustration
A
Five-eighths of a number is equal to two and five-tenths.
B
Five-eighths of a number is equal to negative two and five-tenths.
C
Five-eighths of a number times negative two and five-tenths is two and five-tenths.
D
Five-eighths of a number plus negative two and five-tenths is two and five-tenths.

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