Five friends bought admission tickets the museum and a box lunch. the cost of each admission ticket was $11.75. each box lunch cost $5. write two equivalent expressions and then find the total cost.

Cost of the admission tickets: 11.75x

Cost of the box lunch: 5x

Expressions to find the total cost = (1) ... 11.75x + 5x

That is equivalent to: (2) ... (11.75 + 5) x = 16.75x.

Now calculate the cost for x = 5 using both expressions:

1) 11.75 (5) + 5 (5) = 58.75 + 25 = 83.75

2) 16.75 (5) = 83.75

Of course you got the same result with both expressions.