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mash [69]
3 years ago
12

How many pairs can be made from 8 different objects?

Mathematics
1 answer:
NeTakaya3 years ago
3 0
The correct answer is 31. I did it incorrectly the first time, but the answer is 31. :-) Thanks Olivia!
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a buret is a tool designed to transfer precise amounts of liquid .A buret initially contains 70.00 millimeters of a solution and
katrin [286]

Let:

Vbu= Volume of the buret

Vbk= Volume of the beaker

A buret initially contains 70.00 millimeters of a solution and a beaker initially contains 20.00 ml of the solution the buret drips solution into the Beaker. each drip contains 0.05 mL of solution, therefore:

x = Number of drips

a = volume of each drip

\begin{gathered} Vbu=70-ax \\ Vbk=20+ax \\ \text{where:} \\ a=0.05 \\ Vbu=70-0.05x \\ Vbk=20+0.05x \end{gathered}

after how many drips will the volume of the solution in the buret and beaker be equal ?​ Vbu = Vbk:

\begin{gathered} Vbu=Vbk \\ 70-0.05x=20+0.05x \\ \text{Solve for x:} \\ 0.1x=70-20 \\ 0.1x=50 \\ x=\frac{50}{0.1} \\ x=500 \end{gathered}

5 0
1 year ago
What quadrant is (20, 10) in??​
dalvyx [7]

Answer:

(20,10) is gonna be in The first quadrant

5 0
2 years ago
What is the scale factor of the triangle dilated from OPQ to OP’Q’ from center 0 explain or show work
Over [174]

Answer:

2/5

Step-by-step explanation:

Each side of OP'Q' is 2/5 of OPQ.  Ex) OP = 10, OP' = 4.

6 0
3 years ago
Read 2 more answers
Two number cubes are rolled. What is the probability of rolling a sum of 9 or a sum that is even?
Murljashka [212]

Well I don't know !
Let's figure it out together.

Each cube can land in 6 different ways, so the total number
of possible results with two cubes is (6 x 6) = 36 .

Now we need to figure out how many of those 36 possibilities
meet your specifications ... either 9 or any even number.

Ways to make 9 :

3 . . . 6
6 . . . 3
4 . . . 5
5 . . . 4

Four ways to make 9.
____________________________

Ways to make an even number:

1 . . . 1
3 . . . 1
1 . . . 3
2 . . . 2
5 . . . 1
1 . . . 5
6 . . . 2
2 . . . 6
6 . . . 4
4 . . . 6
6 . . . 6

Eleven ways to make an even number.
_____________________

Total number of ways to succeed = (4 + 11) = 15 ways

So the probability of succeeding (rolling 9 or an even number)
is

               15 / 36  =  5 / 12  =  0.41666... =  (41 and 2/3) % .

8 0
3 years ago
Read 2 more answers
How long does it takes the earth to complete one full revolution?<br><br>A. 90<br>B. 180<br>C. 365​
EleoNora [17]
C.365 because one revolution takes 365.25 days or one year
7 0
3 years ago
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