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olchik [2.2K]
3 years ago
12

PLEASE ANSWER ALL QUESTIONS 69 POINTS WILL MARK BRAINLIST

Mathematics
1 answer:
IRINA_888 [86]3 years ago
4 0

Answer:

  • See below

Step-by-step explanation:

<u>Proportional relationship formula is:</u>

  • y = kx

a) Use point (1, 3.5) to find k:

  • 3.5 = k*1
  • k = 3.5

b)<u> Unit rate is:</u>

  • cm per min

c) <u>Point (8, 28) indicates:</u>

  • Water level of 28 cm after 8 min

d) <u>x = 20, y =?</u>

  • y = 3.5(20) = 70 cm

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If you simplify once more, you get

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