algebra

posted by ann

could you please help me?
john needs to earn $693 to pay for trip. he finds job that pays $7 per hour and he mows lawns for $9. an hour

a. write an inequality describing his goal in terms of hours at his job, x, and hours mowing lawns, y .
i wrote 7x + 9y = 693., is this correct, if not could you please show me thanks ann

b. to graph the inequality how would i get points?

  1. Reiny

    They had asked for an inequality.
    Since he needs at least $693 you should have had

    7x + 9y ≥ 693

    to graph this, I would use the intercepts, (693 divides nicely by both 7 and 9)

    for x-intercept, let y = 0
    7x = 693 , x = 99

    for y-interecept , let x = 0
    9y = 693, y = 77

    so after scaling your graph, plot
    (0,77) and (99,0)
    draw a solid line (the points on the line are included)
    and shade in the region above the line.

  2. ann

    thank you so much for your help reiny. i really appreciate it.ann

  3. carissa

    YOU EARN 15N DOLLARS FOR MOWING N LAWNS.HOW MUCH DO YOU EARN FOR MOWING ONE LAWN? SEVEN LAWNS

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