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algebra

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2x + 3y is less than or equal to 6

solve b=6c for c

The length of a rectangle is fixed at 15cm. What widths will make the perimeter greater than 80 cm?

solve the compound inequality:
6>-5x + 5 or 10 is less than or equal to -5x+4

  • algebra -

    1. 2x + 3y <= 6. Solve for ?

    3y<= -2x + 6,
    y = -2x/3 + 2.

    2. b = 6c.
    c = b/6.

    3. Given: L = 15 cm.
    2L + 2W > 80,
    30 + 2W > 80,
    2W > 80 - 30,
    2W > 50,
    W > 25 cm

    4. I'm assuming both binomials =
    -5x + 5.

    6 > - 5x + 5 >= 10,
    Subtract 5:
    6 - 5 > -x >= 10 - 5,
    1 > - 5x >= 5,
    Multiply all terms by -5 and reverse
    inequality sign:
    1/-5 < x <= 5/-5,
    -1/5 < x <= -1.

  • algebra -

    1. Ans: y <= -2x/3 + 2.

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