Math

Your local gas station is having a price war. During the past 7 days, they have lowered the price of regular gas by $.02 each day. Define a variable. Then write and solve an equation to find the total change in gas price. Show your work.

I need help because I am stuck on this one. Thanks!

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  1. A variable is a quantity that may change within the context of a mathematical problem or experiment.
    n-7x$0.02
    n-$0.14
    changed $0.14
    This is my understanding of the problem. Apologies if it is incorrect.

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  2. This is one solution I found via "Socratic Q&A":Explanation:
    Let's let:
    t
    be the total change in the price of gas, what we are solving for in this problem.
    d
    be the number of days the prices has decreased. 7 for this problem.
    c
    be the change in price each day. -$0.02 for this problem (the price has been lowered so this number is negative).
    The formula will be:
    t
    =
    d

    c
    Substituting and calculating
    t
    gives:
    #t = 7 * -$0.02$
    t
    =

    $
    0.14
    $
    Over the last 7 days the price of gas has changed

    $
    0.14

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  3. say wht

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