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Flauer [41]
3 years ago
12

For all the following, which ones represent y as a function of x, and how do you know?

Mathematics
1 answer:
earnstyle [38]3 years ago
4 0
Only 25 and 28 are functions.

A function must have only one y value per x value. For 26, the y value of 0 and multiple others have two different y values. For 27, all x values less than 0 have multiple y values.
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A 29<br> B 58<br> C 13.5<br> D 14.5
matrenka [14]
The answer is d actually I don’t know
8 0
3 years ago
How would you do this as a decimal number ?
Contact [7]

Answer:

-5.875

Step-by-step explanation:

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[someone help] The speed of the object 7 seconds after it is dropped is ___m/sec
nadezda [96]

9514 1404 393

Answer:

  68.6 m/s

Step-by-step explanation:

The speed at a given time is the derivative of the height at that time.

  dh/dt = -9.8t

At t=7, the speed is ...

  -9.8(7) = -68.6 . . . . . meters per second (downward)

The speed is 68.6 meters per second.

_____

<em>Additional comment</em>

Height is considered to be positive in the up direction, so velocity and acceleration are also positive in the up direction. The derivative of height will be the velocity. Its negative sign in this case indicates the object is moving in the downward direction. The speed is the magnitude (absolute value) of the velocity.

3 0
3 years ago
What percent of 3,000 is 18
neonofarm [45]

Answer: 0.6%

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Find the missing value for the proportional relationship, in which the number of cents depends on the number of minutes.
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