Brayton has a goal of saving more than $350 this week. He earns $20 for each kid he tutors after school. This week it also happened to be his birthday, and he received $100 as a gift for his birthday. Write and solve an inequality for the number of kids Brayton needs to tutor this week. Which answer choice best interprets the solution in the context of the problem?(1 point)

Responses

Brayton needs to tutor 12.5 kids to meet his goal.
Brayton needs to tutor 12.5 kids to meet his goal.

Brayton needs to tutor at least 13 hours to meet his goal.
Brayton needs to tutor at least 13 hours to meet his goal.

Brayton needs to tutor at least 13 kids this week to meet his goal.
Brayton needs to tutor at least 13 kids this week to meet his goal.

Brayton needs to tutor more than 12.5 hours to meet his goal.

1 answer

To solve for the number of kids Brayton needs to tutor, we can start by setting up the inequality based on the information given.

Brayton earns $20 for each kid he tutors, and he also received $100 as a birthday gift. Therefore, his total savings can be expressed as:

\[ \text{Total Savings} = 20k + 100 \]

where \(k\) is the number of kids he tutors.

Brayton wants to save more than $350, so we can set up the following inequality:

\[ 20k + 100 > 350 \]

Now, let's solve the inequality step-by-step:

  1. Subtract 100 from both sides:

\[ 20k > 350 - 100 \] \[ 20k > 250 \]

  1. Divide both sides by 20:

\[ k > \frac{250}{20} \] \[ k > 12.5 \]

Brayton needs to tutor more than 12.5 kids. Since he can't tutor a fraction of a kid, he needs to tutor at least 13 kids to meet his goal.

Thus, the best interpretation of the solution in the context of the problem is:

Brayton needs to tutor at least 13 kids this week to meet his goal.