Question

A student babysitting for$5 per hour writes the expression 5n to represent the money he makes for n hours. another student writes 3n 15 to represent the amount in dollars she makes. what is the second students hourly rate

Answer 1

The second student's hourly rate is $3.

Step-by-step explanation:

In this scenario, the student writes the expression 3n + 15 to represent the amount of money she makes for n hours. To find the second student's hourly rate, we need to isolate the coefficient of n, which represents the hourly rate. We can do this by rewriting the expression in the form ax + b, where a is the hourly rate and b is any constant term. So, the expression 3n + 15 can be rewritten as 3n + 0(5), since 0 multiplied by anything is 0. Therefore, the second student's hourly rate is $3.

Answer 2

If 5 per hour makes 5n, then what per hour makes 3n? (per=multiply, n=number of hours, # per hour= hourly rate) Hint: look at the coefficient (number being multiplied by the variable, which in this case is n) for the hourly rate.