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VashaNatasha [74]
3 years ago
12

Find the x-intercepts and y-intercept for the parabola below. Write answers as (x,y) coordinates.

Mathematics
1 answer:
dimulka [17.4K]3 years ago
4 0
The equation given is:
y = -7x^2 - 4x + 3

(1) The x intercept occurs at the point that has y = 0, therefore:
y = -7x^2 - 4x + 3
0 = -7x^2 - 4x + 3
(7x-3)(x+1) = 0
either x = 3/7 ......> the point is (3/7 , 0)
or x = -1 ......> the point is (-1,0)

(2) The y-intercept occurs at the point that has x = 0, therefore:
y = -7x^2 - 4x + 3
y = -7(0)^2 - 4(0) + 3
y = 3 ............> the point is (0,3)
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Order the following numbers written in scientific notation from greatest to least: 3.9 × 105, 6.1 × 103, 9.3 × 105, 1.6 × 103 A.
Licemer1 [7]

The numbers are:

3.9 × 105 = 409.5

6.1 ×103 = 628.3

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Arranging from greatest to least and in scientific notation form gives:

9.3 × 105 , 6.1 × 103 , 3.9 × 105 , 1.6 × 103

*(Seems like there is no correct answer from the choices given there).

5 0
3 years ago
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irakobra [83]

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3 years ago
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pishuonlain [190]

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Step-by-step explanation:

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3 years ago
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The answer is C, but I don't understand why- can anyone tell me?
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Answer:

It's C because we are adding a number on the x but here we skip 5 so it's 6, and on y we add 4 up but since we skipped 5 we add 8 and we get 24. 6, 24. You may say "but SpiritBear, 17 plus eight is 25" and that is true, but if you notice the lowest dot actually starts on 5, not 4 making C right.

Hope this helped and wasn't too confusing

7 0
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