80.5 is the answer to this problem.
Answer:
62.5
Step-by-step explanation:
1. convert percent value to decimal
30.00/100=.3
2. turn problem into equation where x equals the original price
x*.3=18.75
3. solve
(x*.3=18.750)/.3
x=62.5
Answer:
3x-6=12
3x-6=-12
x=6
x= -2
1st x = -2
2nd x = 6
Step-by-step explanation:
It would be between 2.77 and 2.79
Answer:
Peter swam 12 hours, Pam swam 6
Step-by-step explanation:
Pam = x
Peter = y
y = 2x (this is because Peter swam twice as much)
y + x = 18 (this is because they both swam a total of 18 hours)
2x + x = 18 (substitute for y)
3x = 18
x = 6 (pam)
Now, I just need to substitute x = 6 into original equation.
y = 2(6)
y = 12 (peter)
