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klemol [59]
3 years ago
6

The cost of a cell phone bill (C) increases when the number of text messages (T) increases. Write the correct equation for this

scenario, and solve for the cost when the number of texts is 4
Mathematics
1 answer:
Studentka2010 [4]3 years ago
3 0
C = kT  where k is some constant number
when T = 4
C = 4k
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slavikrds [6]
P = 2L + 2W
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P = 4x + 8x + 6
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The correct response would be D. 12x + 6.
3 0
3 years ago
3 letters without replacement 4 letters A B C D how many ways can this be done if the order of the choices matters
Veseljchak [2.6K]

Answer:

Since the order of choice matters, we will permute the values.                       a bit more explanation for this:

If the order of choice did NOT matter, ABC and BCA will be counted as one since order of choice does NOT matter

Since order of choice does matter, ABC , BCA and CAB are all different possibilities for the arrangement of the same 3 letters

Since we have 3 slots:

___  ___ ___

Now, for the first slot. You can out either one if the 4 alphabets in the first slot since no slot has been used as of now

So:

_<u>4</u>_ ___ ___

**Keep in mind that the 4 is the possible number of values this slot can have**

Now that one slot has been used, one of the 4 alphabets has been used and since we are not allowed to repeat the same alphabets, we are left with  3 more alphabets

we can put any one of the 3 alphabets in this second slot, Hence:

_<u>4</u>_ <u>_3_</u> ___

Now that 2 of the 4 alphabets have been used, we are left with only 2 alphabets, so there are only 2 possible alphabets for slot 3

Therefore:

_<u>4</u>_ _<u>3</u>_ _<u>2</u>_

Now that we know the possible alphabets for all 3 slots, we will multiply them with each other to get the total possible number of 3 - alphabet words we can make with 4 alphabets

Total possible words = 4 * 3 * 2

Total possible words = 24

We could've used the formula for Permutation as well

8 0
2 years ago
The nile river is 6690 kilometers long.This is 394 kilometers longer than the Amazon River.How long is the Amazon River?
valentinak56 [21]

Answer:

The nile river is 6690 kilometers long.This is 394 kilometers longer than the Amazon River.How long is the Amazon River?

6690-394=6296 kilometers

Step-by-step explanation:

6 0
2 years ago
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katovenus [111]

Answer:

None of them are correct because the circumference formula is 2pir

8 0
3 years ago
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Find the probabilities for a standard normal random variable Z.
vampirchik [111]

Answer:

Step-by-step explanation:

find the attachment showing std normal curve symmetrical about y axis.

Equal probabilities on either side of the mean thus the total probability to the right of mean is 0.50

From the table we can find that

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= 0.9861-0.3849

=0.6012

4 0
3 years ago
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