To find out how many yards Johnnie can mow for no more than $900, we can start with the following formula:
\[ \text{Total Earnings} = \text{Number of Yards Mowed} \times \text{Earnings per Yard} \]
In this case:
- Total Earnings = $900
- Earnings per Yard = $7
We need to determine the maximum number of yards Johnnie can mow without exceeding $900.
Calculation:
\[ \text{Number of Yards Mowed} = \frac{\text{Total Earnings}}{\text{Earnings per Yard}} = \frac{900}{7} \approx 128.57 \]
Since Johnnie can't mow a fraction of a yard, we'll round down to 128 yards.
Table:
| Number of Yards Mowed | Earnings ($) | Total Money in Account ($) | |------------------------|--------------|-----------------------------| | 0 | 0 | 0 | | 10 | 70 | 70 | | 20 | 140 | 140 | | 30 | 210 | 210 | | 40 | 280 | 280 | | 50 | 350 | 350 | | 60 | 420 | 420 | | 70 | 490 | 490 | | 80 | 560 | 560 | | 90 | 630 | 630 | | 100 | 700 | 700 | | 110 | 770 | 770 | | 120 | 840 | 840 | | 128 | 896 | 896 | | 130 | 910 | 910 | (exceeds $900)
Conclusion:
Johnnie can mow a maximum of 128 yards to have no more than $900 in his account.
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