Let's say stress ball cost x and t shirt cost y
8x+5y=111.75
12x+4y=102.00→3x+y=25.5→y=25.5-3x
8x+5(25.5-3x)= 111.75
8x+127.5-15x=111.75
-7x=-15.75
x=2.25
12x+4y=102
12(2.25)+4y=102
27+4y=102
4y=75
y=18.75
d is the correct answer
It will take 63 minutes to run 6 miles.
Answer: x=36
Step-by-step explanation:
Step-by-step explanation:

Since we need to find the radius, then we will rearrange the second formula.




So, the radius of a circle that has a circumference of 457 is about 72.8 cm