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meriva
3 years ago
13

The image of a parabolic lens is traced onto a graph. The function f(x) = (x + 8)(x – 4) represents the image. At which points d

oes the image cross the x-axis?
A.(–8, 0) and (4, 0)
B.(8, 0) and (–4, 0)
C.(2, 0) and (–1, 0)
D.(–2, 0) and (1, 0)
Mathematics
2 answers:
Mademuasel [1]3 years ago
7 0

Answer:

its a

Step-by-step explanation:

took the quiz

Oksanka [162]3 years ago
6 0
The values of x that make f(x)=0 are the values of x that make its factors zero.
  x+8 = 0
  x = -8

  x-4 = 0
  x = 4

The appropriate choice is
  A. (-8, 0) and (4, 0)
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dsp73

Answer:

I think maybe angle 7 is =34 degrees

Step-by-step explanation:

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7 0
3 years ago
A piston rises to 5 cm and falls to 3 cm in such a way that it returns to the maximal height three times every two seconds. If w
sveticcg [70]

Answer:

(1 cm)cos3πt

Step-by-step explanation:

Since the piston starts at its maximal height and returns to its maximal height three times evert 2 seconds, it is modelled by a cosine functions, since a cosine function starts at its maximum point. So, its height h = Acos2πft

where A = amplitude of the oscillation and f = frequency of oscillation and t = time of propagation of oscillation.

Now, since the piston rises in such a way that it returns to the maximal height three times every two seconds, its frequency, f = number of oscillations/time taken for oscillation where number of oscillations = 3 and time taken for oscillations  = 2 s

So, f = 3/2 s =1.5 /s = 1.5 Hz

Also, since the the piston moves between 3 cm and 5 cm, the distance between its maximum displacement(crest) of 5 cm and minimum displacement(trough) of 3 cm is H = 5 cm - 3 cm = 2 cm. So its amplitude, A = H/2 = 2 cm/2 = 1 cm

h = Acos2πft

= (1 cm)cos2π(1.5Hz)t

= (1 cm)cos3πt

7 0
3 years ago
Which is greater .83 or .083?
Serggg [28]
.83 is greater .038 is in the thousands place and .83 is in the hundreds hope this Helped :D
8 0
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Consider that the length of rectangle A is 10 cm and its width is 6 cm. Which rectangle is similar to rectangle A?
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Answer: B

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Step-by-step explanation:

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Read 2 more answers
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