Answer:
At 6 hours, they both charge the same amount
Step-by-step explanation:
You need to create an equation for each.
BB: y=13+ 3x
DD: 1 + 5x
Since they are asking to find when they are the same amount, you equal the two equations and solve for x.
13+3x=1+5x
12=2x
x=6
6 hours
both will equal $31 at 6 hours
See attached picture
Sorry but the correct answer is (x+3)2+(y−1)2=81
Because the radius squared is the answer of the equation
Answer: 38.22
