Your local gas stations are having a price war. during the past 7 days they have lowered the price of regular gas by $0.2 each day. define a variable. then write and solve an equation to find the total change in gas price.

Let the previous price of the gas be represented by = x

Let the current price of the gas be represented by = y

As given, during the past 7 days they have lowered the price of regular gas by $0.2 each day.

This means after 7 days the price has been lowered by = $1.4

Equation becomes:

So, total change in the price in 7 days is $1.4 less than the previous amount.

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.