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charle [14.2K]
3 years ago
5

Find the x-intercepts of the following polynomial function'' f (x) = x^2 - 2x - 80

Mathematics
1 answer:
pychu [463]3 years ago
7 0

Answer:

(-8 , 0)

(10 , 0)

Step-by-step explanation:

(-8)^2 - 2(-8) - 80 = 0

(10)^2 - 2(10) - 80 = 0

then (-8 , 0) and (10 , 0) are x-intercepts Of the polynomial f

the others are not because (for instance):

(8)^2-2(8)-80 =

:)-32

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TEA [102]

The slide needs to be 4.123 meters

Step-by-step explanation:

Length for the ladder- 1 mtr

Distance of the bottom of the slide from the ladder- 4 mtr

Length of the slide needed

We can view the whole set up in the form of a right-angled triangle with the base representing the slide distance from the ladder, ladder length representing altitude and slide length representing as hypotenuse (As provided in the diagram)

For right-angled triangle we know from Pythagoras theorem-

Base² + altitude²= hypotenuse ²

Substituting the values of base as 4 mtr and altitude as 1 m

(Hypotenuse)²= 17

∴ Hypotenuse (slide length) =4.123 mtr

∴ Length of the slide needed= 4.123 meters

7 0
3 years ago
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I am just completely lost and am unsure of how to approach this problem.
Anastasy [175]

Answer:

68°

Step-by-step explanation:

As BA⊥BD, so ∠ABD = 90°

also, ∠ABD = ∠CBD + ∠ABC

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⇒  12x = 48°

⇒  x = 4°

now,

∠CBD = 4x + 52°

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3 years ago
What value of z makes the equation true?<br> 5/6=z/12<br> A. 6<br> B. 10<br> C. 15<br> D. 5
vazorg [7]
It would be 10 bc u times both by two
6 0
3 years ago
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Four-thirds times the sum of a number and 8 is 24. What is the number?
schepotkina [342]

Answer:

D, 10.

Step-by-step explanation:

10+8=18 4/3x18=24

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2 years ago
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