Question

kehlani is saving up to buy a new bicycle. she already has $80 and can save an additional $9 per week using money from her after school job. how much total money would kehlani have after 7 weeks of saving? also, write an expression that represents the amount of money kehlani would have saved in w weeks.

Explanation:

Step1: Define the variables and initial amount

Kehlani starts with $80, and saves $9 per week. Let \( w \) be the number of weeks. The total savings \( S \) can be represented as \( S = 80 + 9w \).

Step2: Calculate savings after 7 weeks

Substitute \( w = 7 \) into the formula: \( S = 80 + 9\times7 \). First, calculate \( 9\times7 = 63 \). Then, \( 80 + 63 = 143 \).

Step3: Write the expression for \( w \) weeks

The expression is \( 80 + 9w \) (or \( 9w + 80 \)).

Answer:

Total savings after 7 weeks: \( \boldsymbol{143} \)
Total savings after \( w \) weeks: \( \boldsymbol{80 + 9w} \) (or \( \boldsymbol{9w + 80} \))