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matrenka [14]
3 years ago
5

40% of a certain number is 80 what is that number ?

Mathematics
2 answers:
Ad libitum [116K]3 years ago
3 0
Let number be x
40/100(x)=80
x=200
lutik1710 [3]3 years ago
3 0
Since 40%=80, 80% must be 160, so half of 40 is 20  so the 20% is 40, 40+160=200

Your answer is 200.
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A fair die is cast four times. Calculate
Anestetic [448]

Answer:

0.1319 or 13.2%

Step-by-step explanation:

You can solve this using the binomial probability formula.

The fact that "obtaining at least two 6s" requires you to include cases where you would get three and four 6s as well.

Then, we can set the equation as follows:

P(X≥x) = ∑(k=x to n) C(n k) p^k q^(n-k)

n=4, x=2, k=2

when x=2  (4 2)(1/6)^2(5/6)^4-2 = 0.1157

when x=3  (4 3)(1/6)^3(5/6)^4-3 = 0.0154

when x=4 (4 4)(1/6)^4(5/6)^4-4 = 0.0008

Add them up, and you should get 0.1319 or 13.2% (rounded to the nearest tenth)

4 0
3 years ago
Bro I am so bad at math and I need help ;-;
serg [7]

Answer:

1. M > -7

2. y < -1

3. m < -12

4. k > -2

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4 0
3 years ago
36/3 in simplest form
AveGali [126]

Answer:12/1

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
1/2x + 1/3x = 10<br><br> Thank you
yuradex [85]

Answer:

x=12

Step-by-step explanation:

8 0
3 years ago
Among all positive numbers , whose sum is 12, find those for which the product of the two numbers and their difference is larges
Karolina [17]

Answer: The numbers whose sum equals 12 and whose product and difference is largest is 6 and 6

Step-by-step explanation:

numbers whose sum is 12

Sum =12         Product       Difference               Product- Difference  

11 +1                   11                    10                                1

10 +2                20                   8                                 12

9 +3                  27                   6                                 21

 8 +4                 32                   4                                 28

7  +5                  35                   2                                33

6+6                    36                   0                                36

The numbers whose sum equals 12 and whose product and difference is largest is 6 and 6

4 0
3 years ago
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