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Rzqust [24]
4 years ago
12

Can someone please help me with question d?

Mathematics
1 answer:
Mariulka [41]4 years ago
4 0
       We already know that the hourly rate for John is : 1/6 and the hourly rate for Rick is : 1/8. What we don`t know is a hourly rate for Molly and we will call it 1 / x.
      The hourly rate for all together is: 1 / 3
      An equation is:
      1 / 3 = 1 / x + 1 / 6 + 1 / 8
      1 / 3 = 1 / x + 4 / 24 + 3 / 24
      1 / 3 = 1 / x + 7 / 24
      1 / x = 1 / 3 - 7 / 24
      1 / x = 8 / 24 - 7 / 24
      1 / x = 1 / 24
      1 / 3 = 1 / 24 + 1 / 6 + 1 / 8
      The hourly rate for Molly is 1 / 24. Molly can paint the room alone for 24 hours.

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tatiyna

Answer:

y = -2x - 4

Step-by-step explanation:

Formula is y = mx + b where m is the slope and b is the y-intercept

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The slope is -2

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So let's find b, insert 2 for y and -3 for x to find b

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Subtract 6 from both sides to get b alone

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We found what b equals (the y-intercept), which is -4

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