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sveticcg [70]
2 years ago
15

The average temperature in Fairbanks, Alaska, was —4°F one day and

Mathematics
1 answer:
Oksanka [162]2 years ago
8 0

Answer:

  • 20°

Step-by-step explanation:

<u>We know that:</u>

  • -4 + x = 16 [x = difference between two temperatures]

<u>Solution:</u>

  • -4 + x = 16
  • => x = 16 + 4
  • => x = 20

Hence, the difference between the two temperatures is 20°.

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I assume that the parabola in this particular problem is one whose axis of symmetry is parallel to the y axis. The formula we're going to use in this case is (x-h)2=4p(y-k). We know variables h and k from the vertex (1,20) but p is not given. However, we can solve for p by substituting values x and y in the formula with the y-intercept:

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Solving for p, p=-1/16.

Going back to the formula, we can finally solve for the x-intercepts. Simply fill in variables p, h and k then set y to zero:

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