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qwelly [4]
3 years ago
12

Write a rule for a function with a parabolic graph that contains the x-intercepts (-20,0) and (40,0) and a maximum point whose y

-coordinate is 30.
Mathematics
1 answer:
lakkis [162]3 years ago
7 0

Step-by-step explanation:

Since the x-intercepts are -20 and 40, the line of symmetry is x = (-20 + 40)/2 = 10.

Now we have y = a(x - 10)² + 30, where a is an unknown constant. We can find a by using an x-intercept point.

=> (0) = a[(40) - 10]² + 30

=> 900a + 30 = 0, a = -1/30.

Hence the rule is y = -(x - 10)²/30 + 30.

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<h3>What is the Pythagoras theorem?</h3>

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The figure is missing.

The right-angle triangle is shown in the picture; please refer to the picture.

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Learn more about Pythagoras' theorem here:

brainly.com/question/21511305

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