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rosijanka [135]
3 years ago
10

A teacher needs to choose seven students to hand out papers. The total number of ways he may choose the students can be found us

ing a combination
Mathematics
2 answers:
Vlad [161]3 years ago
8 0

Answer:

True

Step-by-step explanation:

Apex

sladkih [1.3K]3 years ago
7 0
It may be 2 students
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PLEASE HELP!!! I tried everything from dividing, adding, subtracting, multiplying, you name it but I can not seem to get the cor
nadya68 [22]

9514 1404 393

Answer:

  244 tiles

Step-by-step explanation:

These "border" problems can be a little tricky.

The tiles are 1 ft square, so an integer number of them fit along each of the sides. The 40-ft side will take 40 tiles for its border, and the 80-ft side will take 80 tiles.

The total number of tiles along each of the four sides is ...

  40 + 80 + 40 + 80 = 240 . . . tiles

However, there is also a tile in each of the corners. There are 4 of those, so the total number of tiles surrounding the pool is ...

  240 +4 = 244 tiles

__

<em>Alternate solution</em>

For a border of width w, the outside area of the pool plus the border is ...

  A = LW = (80 +2w)(40 +2w) = 80·40 +240w +4w²

The area of the pool is ...

  A = LW = (80)(40) = 80·40

Subtracting the area of the pool from the total area including the border gives ...

  border area = (80·40 +240w +4w²) -(80·40) = 240w +4w²

We know the width of the border is 1 foot, so w=1 and the border area is ...

  border area = 240·1 +4·1² = 244 . . . . square feet

Each tile is 1 square foot, so 244 tiles are needed for the border.

_____

It can help to draw yourself a diagram. It can also help to make a small model using blocks, Scrabble tiles, Legos, jigsaw puzzle pieces, squares cut from paper, or even coins (pennies). Anything that will give you an idea of how to count the tiles required to make a border can be helpful.

3 0
3 years ago
Read 2 more answers
Choose the correct term to complete the sentence.
galina1969 [7]

Answer:

Step-by-step explanation:

Exponential growth

8 0
3 years ago
If there is 520 grams of radioactive material with a half-life of 12 hours, how much of the radioactive material will be left af
AURORKA [14]
This is a fairly easy half-life problem
Each half-life reduces the radioactive material by one half.
So after 72 hours the radioactive material would have undergone 6 half-lives. 
2^6 = 64.
So, there will be one sixty-fourth of the material left.
520 / 64 = 8.125 grams will remain.
radioactive decay is an exponential decay function.

Source:
http://www.1728.org/halflife.htm


3 0
3 years ago
Read 2 more answers
What value of c makes x2 − 12x + c a perfect square trinomial? −36 −24 24 36
rewona [7]
Take half of the middle coefficient.
Then square it.

-12/2 = -6

(-6)^2 = 36

c = 36
8 0
3 years ago
Read 2 more answers
May I have help on This question please I’ll award you brainliest
BartSMP [9]

Answer:

The top right answer choice is correct.

2.3 x 12 = 27.6

27.6 > 27.1

Step-by-step explanation:

Well first off, we know that:

1 foot = 12 inches

To compare the two, we first want to covert 2.3 feet into inches.

2.3 x 12 = 27.6 inches

Now that we have our two values, we need to decide which is greater than the other.

27.6   or    27.1

Both values have a decimal that shows tenths. In this problem, 6 tenths is larger than 1 tenth. Therefore:

27.6 inches > 27.1 inches

5 0
3 years ago
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