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zysi [14]
3 years ago
10

Put the operations to simplify the expression in the correct order.

Mathematics
1 answer:
4vir4ik [10]3 years ago
6 0

Answer:

42

Step-by-step explanation:

First multiply 5*9=45

Next subtract 15=30

Then Add 82 to 30=112

Last subtract 70 from 112=42

SO you get 42

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If two fair dice are tossed, what is the smallest number of throws, n, for which the probability of getting at least one double
amid [387]

This is a rather famous probability problem.

The easiest way to solve this is to calculate the probability that you WON'T roll a "double 6" (or a twelve) each time you roll the dice.  There are 36 ways in which dice rols can appear and only one is a twelve.  So, for one roll, the probability that you will NOT get a twelve is (35/36)^n where 35/36 is about .97222222 and n would equal 1 for the first trial.  So for your first roll the odds that you WON'T get a 12 is .97222222.

For the second roll we calculate (35/36) to the second power or (35/36)^2 which equals about .945216.

When we get to the 24th roll we calculate (.97222222)^24 which equals 0.508596.  

For the 25th roll, we calculate (.97222222)^25 which equals  0.494468.  For the first time we have reached a probability which is lower than 50 per cent.  That is to say, after 25 rolls, we have reached a point in which the probability is less than 50 per cent that we will NOT roll a twelve.

To phrase this more clearly, after 25 rolls we reach a point where the probability is greater then 50 per cent that you will roll a 12 at least once.

Please go to this page 1728.com/puzzle3.htm and look at puzzle 48. (The last puzzle on the page).  An intersting story associated with this probability problem is that in 1952, a gambler named Fat the Butch bet someone $1,000 that he could roll a 12 after 21 throws.  (He miscalculated the odds [as we know you need 25 throws] and after several HOURS, he lost $49,000!!!)

Please go that page and it has a link to the Fat the Butch story.


3 0
3 years ago
2.86 = ? Tenths + 6 hundredths
melamori03 [73]
2.86 
= 28 tenths + six hundreths.

(The number directly after the decimal point is an hundreth)
Since there is a 2.0 (twenty tenths), the answer is:

20+8 = 28 tenths.
8 0
4 years ago
Math problem for highschool
tresset_1 [31]

Answer:

297 units squared

Step-by-step explanation:

You just have to break the squares down and compare them to the other sides of the squares.  For example, F is a 4 by 4 square and B is a 5 by 5 square, to find the dimensions of square E, you would just subtract 5 by 4.  By looking at the side relationships of the squares, you can easily find the dimensions of each one.

A - 9 by 9

B - 5 by 5

C - 6 by 6

D - 7 by 7

E - 1 by 1

F - 4 by 4

G - 8 by 8

H - 5 by 5

Multiply and add to get 297

7 0
2 years ago
Read 2 more answers
Y=-3x+6 and y=5x-2 for y
andriy [413]

Answer:

The first one is x=2 and the second one is x=2/5 or 0.4

Step-by-step explanation:

4 0
3 years ago
What is the Slope in the equation y= -2x +5
cricket20 [7]

Answer:

-2

Step-by-step explanation:

y=-2x+5

y=mx+b where m=slope and b=y-intercept

4 0
3 years ago
Read 2 more answers
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