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This equation shows how the total number of postcards Roxanne buys is related to the number of days she spends on vacation. $\newline$ $p = 4d$ $\newline$ The variable $d$ represents the number of days she spends on vacation, and the variable $p$ represents the total number of postcards she buys. After $2$ days of vacation, how many total postcards will Roxanne have bought? $\newline$ _____ postcards

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Evaluate a linear function: word problems

Full solution

Q. This equation shows how the total number of postcards Roxanne buys is related to the number of days she spends on vacation.

\newline

p = 4d

\newline

The variable

d

represents the number of days she spends on vacation, and the variable

p

represents the total number of postcards she buys. After

2

days of vacation, how many total postcards will Roxanne have bought?

\newline

_____ postcards

Identify Vacation Duration: Roxanne's been on vacation for $2$ days, so $d$ equals $2$ .
Substitute $d$ in Equation: Plug in $2$ for $d$ in the equation $p = 4d$ , so it's $p = 4 \times 2$ .
Calculate Result: Do the math, $4 \times 2$ is $8$ , so $p$ equals $8$ .
Final Postcard Count: That means Roxanne bought $8$ postcards in $2$ days.

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