Final answer:
The expression 100(0.65f+0.58s) can be simplified to 65f+58s, which can be used to find the percentage of free throws Clarissa and Alexis made together.
Step-by-step explanation:
The expression 100(0.65f+0.58s) can be used to find the percentage of free throws Clarissa (f) and Alexis (s) made together. To find another expression that could be used, we can simplify the original expression. Starting with 100(0.65f+0.58s), we distribute the 100 to both terms inside the parentheses, resulting in 65f+58s. This simplified expression is equivalent to the original expression and can be used to find the percentage of free throws made by Clarissa and Alexis together.
Therefore, the correct answer is option a. 65f+58s.