Answer:
Carrie's hourly rate = $7.5 per hour.
Step-by-step explanation:
Flat fee charged by Carrie = $5
Hourly rate charged by Carries is given = [tex]\$r[/tex] per hour
Working 2 hours at job, the equation that represents amount charged by Carrie is given by:
[tex]2r+5=20[/tex]
Evaluating the above equation to find Carrie's hourly rate [tex]r[/tex]
Subtracting both sides by 5.
[tex]2r+5-5=20-5[/tex]
[tex]2r=15[/tex]
Dividing both sides by 2.
[tex]\frac{2r}{2}=\frac{15}{2}[/tex]
∴ [tex]r=7.5[/tex]
∴ Carrie's hourly rate = $7.5 per hour.
