robins dad took her and some friends out to eat for her birthday. if each meal costs 3 dollars and her dad…
robins dad took her and some friends out to eat for her birthday. if each meal costs 3 dollars and her dad paid for 7 meals, how much did he spend?
Answer
Explanation:
Step1: Analyze the problem
We need to find the total cost. The formula is ( \text{Total Cost}=\text{Cost per meal}\times\text{Number of meals} ).
Step2: Substitute the values
Given that the cost per meal ( a = 3 ) dollars and the number of meals ( b=7 ). Then the total cost ( C=a\times b ). Substitute ( a = 3 ) and ( b = 7 ) into the formula: ( C=3\times7 ).
Step3: Calculate the result
( 3\times7 = 21 ).
Answer:
21