Janelle has $75. she buys jeans that are discounted 30% and then uses an in-store coupon

Janelle has $75. she buys jeans that are discounted 30% and then uses an in-store coupon for $10 off the discounted price. after paying $3.26 in sales tax, she receives $17.34

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  1. If you want to the know the total price of the jeans, with discount coupon and sales tax then it's $15.76

    $75 x 0.30 = $22.50

    $22.50 - $10 = $12.50

    $12.50 + $3.26 = $15.76

  2. the red lines denote the population of the bacteria after 35 hours. that would be 2,409.24. the y-intercept is the blue line which is 800 because that is the starting point. the equation used to make the graph is 800(1.032)^h, where h is the number of hours.

    step-by-step explanation:

  3. The jean were 31.08 dollars

    Step-by-step explanation:

    75 - 10 = 65

    3.26 - 65 = 61.74

    61.74 - 17.34 = 44.40

    30% of 44.40

    = 31.08 dollars

  4. So, she paid (75-17.34=57.66) for the purchase

    Or, the jeans costed 57.66-3.26=54.4 (prize minus sales tax)

    But she got a 10 dollars off! so that means that the jeans actually costed 64.4

    now, the 64.40 was the prize discounted by 30%:

    64.40=(100-30)%*x

    where x was the original prize

    64.40=0.7x
    644=7x
    x=644/7
    x=92

    so the original prize was 92 dollars.

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