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galina1969 [7]
3 years ago
5

What is the value of the expression below ?-0.25-(3/5)+0.6+(-1/4)

Mathematics
1 answer:
bagirrra123 [75]3 years ago
4 0
I believe the answe is -0.5
Hope this helps :)
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Help plz only one question and the ans will come 100 ,100 ,80 of each angle​
salantis [7]

z° = 80° (Being corresponding angles)

y° + 80° = 180° (Being linear pair of angles)

=> y° = 180° - 80°

=> y° = 100°

x° = y° (Being interior opposite angles)

=> x° = 100°

6 0
3 years ago
How can you tell if a decimal can be written as a rational number?
Lubov Fominskaja [6]

Answer:

any decimal that ends after a number of digits such as 7.3 or −1.2684 is a rational number

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
According to a study conducted by the Toronto-based social media analytics firm Sysomos, of all tweets get no reaction. That is,
amm1812

Complete Question

According to a study conducted by the Toronto-based social media analytics firm Sysomos, 75% of all tweets get no reaction. That is, these are tweets that are not replied to or retweeted (Sysomos website, January ). Suppose we randomly select tweets.

a. What is the expected number of these tweets with no reaction (to the nearest whole number)?

b. What are the variance (to 2 decimals) and standard deviation (to 4 decimals) for the number of these tweets with no reaction? Variance Standard deviation

Answer:

a

The mean is  \mu = 150

The variance \sigma^2 =37.5

The standard deviation is \sigma \approx 6.1237

Step-by-step explanation:

A binomial distribution is mathematically represented as B(n,p)

where n denotes the number of independent trials  =200

    And p denote the probability of success  = 0.75

     We also have the probability of failure which is denoted as q and is equivalent to 1-p

if p and q are constant then

In binomial distribution the probability of x success and (n-x) is mathematically represented as

           P[X =x] =[\left n} \atop x}} \right. ] p^x (1-p)^{n-x}

Where x= 0,1,2,...,n for 0\le p \le 1

Now [\left n} \atop x}} \right. ]  = \frac{n!}{x(n-x)!}

Now the mean(Expected number ) of these probability in binomial distribution is mathematically represented as

                  \mu = np

                     = 200 *0.75 = 150

And the variance is mathematically represented as

                 \sigma^2 = np(1-p)

                    = 200 * 0.75 (1-0.75) = 37.5

And the standard deviation is mathematically represented as

                     \sigma = \sqrt{np(1-p)}

                       = \sqrt{200 *0.75(1-0.75)} =\sqrt{37.5} \approx 6.1237

We can obtain the standard z -score of a d

6 0
3 years ago
Write the five term sequence that would represent each recursive rule f(x) = f(x-1) -7; f(2) = 12
barxatty [35]

<u>Answer: </u>

Required five terms of sequence are 19 , 12 , 5 , -2 and -9 .

<u> Solution: </u>

Need to find the five terms of the sequence.

Given recursive rule is f(x) = f(x-1) -7

Substituting x = 2 , f(2) = f(2-1)-7

= f(2) = f(1) – 7    ------(1)

Also given that f(2) = 12.  

On substituting the given value of f(2) in eq (1) we get

12 = f(1) – 7

f(1) = 12 + 7 = 19

Using given recursive rule and given value of f(2) calculating f(3)

Substituting x = 3 ,  

f(3) = f(3-1) – 7  

= f(2) – 7  

= 12 – 7  

= 5

Using given recursive rule and calculated  value of f(3) calculating f(4)

Substituting x = 4,  

f(4) = f(4-1) – 7  

= f(3) – 7  

= 5– 7  

= -2

Using given recursive rule and calculated  value of f(4) calculating f(5)

Substituting x = 5,  

f(5) = f(5-1) – 7  

= f(4) – 7  

= -2– 7  

= -9

Hence required five terms of sequence are 19 , 12 , 5 , -2 and -9 .

8 0
3 years ago
Help plz will give brainliest
astra-53 [7]
It should be D, I did the math :)
5 0
3 years ago
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