X=29 and y=10
You would isolate one of the variables and then plug the expression into the other equation to find the value of one variable. Then you would plug this value into the other equation to determine the value of the remaining variable.
Before the mechanic worked on it, it cost .09 (cents) per mile. After the mechanic worked on it, it cost .08 (cents) per mile. Divide the number of gallons by the miles in each case and multiply the result by 4.
Answer: Below
Step-by-step explanation:
125% is essentially 1.25 or 125/100.
In mixed number form it's:

the second statement explains which function shows a greater rate of change
the formula is simple interest = Price x rate x time
$2000 x 5 x 10% with is1000