To formulate an equation in standard form for the weights of kumquats \( k \) (in pounds) and Asian pears \( p \) (in pounds), we can derive it based on the prices and total amount spent.
The price for kumquats is $5.00 per pound, and the price for Asian pears is $3.25 per pound. If a customer spends a total of $18, the equation representing this situation is:
\[ 5k + 3.25p = 18 \]
To express this equation in standard form \( Ax + By = C \) (where \( A \), \( B \), and \( C \) are integers), we can eliminate the decimal by multiplying the entire equation by 100 to make it easier to work with:
\[ 500k + 325p = 1800 \]
This equation is now in standard form, where \( A = 500 \), \( B = 325 \), and \( C = 1800 \). Thus:
\[ 500k + 325p = 1800 \]
This is the final equation in standard form.