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Serjik [45]
3 years ago
11

FIRST-PERSON BRAINLIEST Which algebraic expression represents “the sum of a number and 9”?

Mathematics
1 answer:
Dahasolnce [82]3 years ago
7 0

Answer:

Step-by-step explanation:

The sum of a number and 9 is adding of any variable to 9.

E.g the sum of 8 and 7

8+7=15

We can also have the sum of two unknown numbers, we can let the first number be x and the second number be y, then the sum of the two unknown will be (x+y).

So, let apply this to the question

The sum of a number and 9, since we don't the number, let the number be n, then the sum of the number and 9 will be (n+9)

Then the correct option is B which is n+9

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Jayne has 3 quarters, 2 dimes, 1 nickel and 2 pennies in her pocket.how many different amounts of money can she make using some
Papessa [141]

Upper limit: There is a logical maximum that it could be. You can have 0, 1, 2, 3 quarters, 0, 1, 2 dimes, 0, 1 nickels, and 0, 1, 2 pennies. This is a total of 4*3*2*3 = 72. Of course, not all of these are distinct; this is why the answer is smaller. Also, this problem isn't counting $0.00 as a valid combination. Now that we have an idea of how the problems works, lets simplify it a little.

 

Pennies. Since you can have 0, 1, 2 pennies, there will be NO conflicts. (It takes 5 pennies to cause a problem, since then it will conflict with the nickel). It means that for all combinations of quarters, nickels, and dimes, we can have 0, 1, or 2 pennies. This means we can handle the other three coins and handle the pennies later. This brings the upper limit down to 24.

 

One combination has no nickels and no dimes, and another, equivalent combination has one fewer quarters, one nickel, and two dimes. There are three ways for the first combination: 1, 2, 3 quarters only. It will bring down the total to 21.

 

The pennies we have 21*3=63 possibilities.

General process:

Simplify the problem. (Pennies didn’t cause any conflict so they just make 3 times as many combination)

Determine the maximum possible combinations. This is a few multiplications. Not very difficult

Count the duplicates. This is often simpler because there are usually not that many of them. In this case, just three.

 

Put it back together.

<span>Of course, sometimes there will be so many conflicts that anything short of listing them is unreasonable. This was quite a bit more difficult that it would have been to just list those 62 possibilities.  </span>

8 0
3 years ago
what is the measure of PLEASE HELP GIVING 50 POINTS!! <br><br> OPTIONS: <br> 90<br> 37<br> 143<br> 127
sineoko [7]

Answer:

Step-by-step explanation:

La answer es porque esa la respuesta 34 c  d #7 B = 9 37 134 127 la = 292-238 lan Angels Hope En help : )

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3 years ago
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kifflom [539]

Answer:

The answer is d.

Step-by-step explanation:

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castortr0y [4]

Answer:

2346

Step-by-step explanation:

4263x462x346x634x62=3

3 0
2 years ago
What is 5x5 + 5 to the power of 5.
yulyashka [42]

So

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a^n=a×a×a×a..n times

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