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one day a store sold 21 sweatshirts. White ones cost $10.95 and yellow ones costs $13.50. In all $275.85 worth of sweatshirts were sold. How many of each color were sold

How many white sweatshirts were sold?
How many yellow sweatshirts were sold?

  • Math -

    two angles are supplementary. One angle is 3 degrees less that twice the other.Find the measures of the angles.

    what is the measure of the smaller angle
    what is the measure of the other angle

  • Math -

    X White shirts,
    Y yellow shirts,
    X + Y = 21 Shirts.
    Y = 21 - X

    Cost = 10.95x + 13.5y = 275.85,
    Substitute 21 - X for Y
    10.95x + 13.5(21 - x) = 275.85,
    10.95x + 283.5 - 13.5x = 275.85,
    -2.55x = -7.65
    x = 3 = White shirts,
    3 + Y = 21
    y = 18 Yellow shirts.


    x = 1st angle,
    (2x - 3) = 2nd angle,
    x + (2x - 3) = 180 Deg.
    2x - 3 = 180,
    3x = 183,
    x = 61 Deg. = Smaller angle,

    (2x - 3) = 2 * 61 - 3 = 119 Deg. =
    Larger angle.

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