Evaluate basic formulas Evaluating basic formulas really just involves substitution and then basic mathematical operations. Example 1: If we are given the equation C [ 1.25t 4.25 and asked to find the value of C when ng t= 6, we would replace the value of t with a 6 and then perform the given operations (in this case multiplication and addition) CO 1.25 0 4.25 C 1.25(6) 4.25 CO 7.5 4.25 CQ11.75 If we also knew that C represented a total cost and ? represented time in hours, we could then write a sentence such as "After 6 hours the total cost was $11.75" to give the answer context. Recall that C and r are called variables because their values can vary. Also note that an equation can have several variables. Evaluate 7 [ 2.25m 1.25 when m = 15. T = Write a conclusion sentence if m represents miles and T represents the total cost of a taxi ride in dollars. If miles are traveled, the total cost of the taxi ride is $