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tekilochka [14]
3 years ago
15

Helppppppppp plzzz I need this done very soon

Mathematics
1 answer:
Oliga [24]3 years ago
8 0

Answer:

For every 10 on the x axis, there is 80 on the y axis

Step-by-step explanation:

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There are 8 tennis players in a round robin tournament, which means each team will play every other team once. How many matches
Aliun [14]
<h3>Answer:  28</h3>

==========================================================

Explanation:

Method 1

Imagine a table with 8 rows and 8 columns to represent all possible match-ups. You can actually draw out this table or just think of it as a thought experiment.

There are 8*8 = 64 entries in the table. Along the northwest diagonal, we have each team pair up with itself. This is of course silly and impossible. We cross off this entire diagonal so we drop to 64-8 = 56 entries.

Then notice that the lower left corner is a mirror copy of the upper right corner. A match-up like AB is the same as BA. So we must divide by 2 to get 56/2 = 28 different matches.

----------------------------------

Method 2

There are 8 selections for the first slot, and 8-1 = 7 selections for the second slot. We have 8*7 = 56 permutations and 56/2 = 28 combinations.

----------------------------------

Method 3

Use the nCr combination formula with n = 8 and r = 2

n C r = \frac{n!}{r!(n-r)!}\\\\8 C 2 = \frac{8!}{2!*(8-2)!}\\\\8 C 2 = \frac{8!}{2!*6!}\\\\8 C 2 = \frac{8*7*6!}{2!*6!}\\\\ 8 C 2 = \frac{8*7}{2!}\\\\ 8 C 2 = \frac{8*7}{2*1}\\\\ 8 C 2 = \frac{56}{2}\\\\ 8 C 2 = 28\\\\

There are 28 combinations possible. Order doesn't matter (eg: match-up AB is the same as match-up BA).

Notice how the (8*7)/2 expression is part of the steps shown above in the nCr formula.

7 0
1 year ago
Mr. Eanes spent $205.60 at Target. There was a 15% off sale. How much discount did he get?
mojhsa [17]

Answer:

$174.76

Step-by-step explanation:

205.60                     205.60

x 0.15        ---->        - 30.84

-------------   Next      ---------------

30.84                        $174.76

Hope this helped!

8 0
3 years ago
Read 2 more answers
The kindergarten class at Stokes Elementary drinks about 210 pints of milk per week. About how many gallons of milk does the cla
soldier1979 [14.2K]
About 262.5 gallons of milk
4 0
2 years ago
Each week morning sunshine cafe orders coffee packets that costs $2.50 per packet with a 10.00 shipping fee . If morning sunshin
Anni [7]

Answer:

193 packets

Step-by-step explanation:

Each morning they order with a shipping fee of $10 daily.

Considering they order all 7 days of the week, so the total shipping fee for the week would be:

7 * $10 = $70

Their budget for the week is $554, out of which $70 is for shipping for the week, so remaining balance would be:

554 - 70 = $484

This 484 dollars are for coffee packets that cost $2.50 each, so the number of packets would be:

484/2.50 = 193.6

You can't order fractional packets so 193 packets is the max in this budget

7 0
3 years ago
Which expression is a perfect cube?<br> A. x8<br> B. y24<br> C. m28<br> D. x64
OLEGan [10]

Answer:

B. Y²⁴

Step-by-step explanation:

For perfect cubes, the exponents are a multiple of three. If yᵃ is a perfect cube, then a/3=k where k is a whole number.

Among the provided choices, the exponent of y²⁴ is divisible by 3.

24/3 = 8.

Thus y²⁴ is a perfect cube.

6 0
3 years ago
Read 2 more answers
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