Final answer:
To find the cost of 3 orders of fries and 4 drinks, you need to multiply the quantity of each by their individual prices and add the results. The total cost for 3 orders of fries and 4 drinks is $7.43. To find the cost for a variable amount of fries (f) and drinks (d), use the generalized formula: Total cost = (f × $1.05) + (d × $1.07).
Step-by-step explanation:
To calculate the total cost of 3 orders of fries and 4 drinks at the fast food restaurant, we use simple multiplication and addition. For fries priced at $1.05 each and drinks at $1.07 each, the computation would be:
3 orders of fries × $1.05 = $3.15
4 drinks × $1.07 = $4.28
Total cost = Cost of fries + Cost of drinks = $3.15 + $4.28 = $7.43
To total the cost for an undefined number of fries (f) and drinks (d), we use the same approach but with variables:
Total cost for fries = f × $1.05
Total cost for drinks = d × $1.07
Total combined cost = (f × $1.05) + (d × $1.07)
This provides a formula that can be used to calculate the cost for any number of fries and drinks ordered.