If u answer, can u tell me how u did it. thx.

whenever you get charged for a phone service, you'd notice it usually says "so many hrs for so much money", but in short is just the quotient of each  unit, namelhy either hr/$ or $/hr.

the first company charges $10/3.5hr, so the rate is their quotient,  approximately $2.86/hr, namely $2.86 per hour.

the second company charges $1.25/(1/2)hr, so their quotient is $2.5/hr, namely $2.5 per hour.

the answer to the expression is 83

the number of the people going.

step-by-step explanation:

the cost to buy one movie ticket is $7. if the total cost for the movie is a function of how many people go, then the input is : the number of the people going.