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Suppose that you have $\$40$ to spend on records that cost seven dollars each. Write an expression for the number of dollars left after you by $X$ .

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Write a linear function: word problems

Full solution

Q. Suppose that you have

\$40

to spend on records that cost seven dollars each. Write an expression for the number of dollars left after you by

X

.

Identify Cost and Amount: Identify the cost per record and the initial amount of money. $\newline$ Cost per record: $\$7$ $\newline$ Initial amount: $\$40$
Calculate Total Cost: Calculate the total cost for $X$ records. $\newline$ Total cost for $X$ records = $7 \times X$
Write Remaining Money Expression: Write the expression for the remaining money after buying $X$ records. $\newline$ Remaining money = Initial amount - Total cost for $X$ records $\newline$ Remaining money = $40 - 7X$

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