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5 February, 16:25

Drew bought 3 pounds of beans and 2 pounds of peppers for $7.05. Last week he bought 4 pounds of beans and 3 pounds of peppers for $9.83. The price for both items stayed the same both weeks what is the cost per pound

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  1. 5 February, 16:58
    0
    A pound of beans cost $1.49 and a pound of pepper costs $1.29.

    Step-by-step explanation:

    Let the cost per pound of beans=b

    Let the cost per pound of pepper=p

    Drew bought 3 pounds of beans and 2 pounds of peppers for $7.05.

    That gives his cost:

    3b+2p=$7.05

    Similarly, he bought 4 pounds of beans and 3 pounds of peppers for $9.83.

    His cost in this case is represented by:

    4b+3p=$9.83

    We solve the two equations we have derived simultaneously.

    3b+2p=$7.05

    4b+3p=$9.83

    To eliminate p, multiply the first equation by 3 and the second equation by 2.

    9b+6p=21.15

    8b+6p=19.66

    Next we Subtract

    b=1.49

    Substitute b=1.49 into any of the equations to obtain p.

    3b+2p=$7.05

    3 (1.49) + 2p=7.05

    4.47+2p=7.05

    2p=7.05-4.47

    2p=2.58

    p=1.29

    Since b=$1.49, b=$1.29

    Therefore a pound of beans cost $1.49 and a pound of pepper costs $1.29.
  2. 5 February, 17:46
    0
    Cost of each pound of beans is #1.49 and pepper is $1.29

    Step-by-step explanation:

    Let the cost of each pound of beans represent x and the cost of each pound of pepper represent y.

    Since the total cost of 3 pounds of beans and 2 pounds of pepper is $7.05, we derive its first equation:

    3X+2Y = 7.05

    AND

    The other week he bought 4 pounds of beans and 3 pounds of pepper for a combined cost of $9.83 without a change in price in both items during the past few weeks.

    Second equation will be:

    4X+3Y = 9.83.

    Here we have a simultaneous equation and we are going to use the substitution method to get X and Y.

    From the first equation, 3X+2Y=7.05

    X = (7.05-2Y) / 3.

    Apply the above in the second equation (4X+3Y = 9.83.)

    4*{ (7.05-2Y) / 3}

    (28.2-8y+9y) / 3=9.83

    Y=1.29

    Replace Y=1.29 in equation 1 and we have

    3x + (2*1.29) = 7.05

    X=1.49

    Therefore the prices of each pound of beans and that of pepper is $1.49 and $1.29 respectively
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