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3 years ago

How to solve -3a + 52a

2 answers:

6 0

Well it really depends of what a is equal to. But here it is with parenthesis;
( -3 x a ) + (52 x a) so you are adding -3 x a to 52 x a. If you know what a is I could give you the final answer.

alisha [4.7K]3 years ago

5 0

Simple...

you have: -3a+52a

Simply add--->>

49a

Thus, your answer.

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The number and frequency of Atlantic hurricanes annually from 1940 through 2007 is shown here:

klio [65]

Answer:

The probability table is shown below.

A Poisson distribution can be used to approximate the model of the number of hurricanes each season.

Step-by-step explanation:

(a)

The formula to compute the probability of an event E is:

$P(E)=\frac{Favorable\ no.\ of\ frequencies}{Total\ NO.\ of\ frequencies}$

Use this formula to compute the probabilities of 0 - 8 hurricanes each season.

The table for the probabilities is shown below.

(b)

Compute the mean number of hurricanes per season as follows:

$E(X)=\frac{\sum x f_{x}}{\sum f_{x}}=\frac{176}{68}= 2.5882\approx2.59$

If the variable X follows a Poisson distribution with parameter λ = 7.56 then the probability function is:

$P(X=x)=\frac{e^{-2.59}(2.59)^{x}}{x!} ;\ x=0, 1, 2,...$

Compute the probability of X = 0 as follows:

$P(X=0)=\frac{e^{-2.59}(2.59)^{0}}{0!} =\frac{0.075\times1}{1}=0.075$

Compute the probability of X = 1 as follows:

$\neq P(X=1)=\frac{e^{-2.59}(2.59)^{1}}{1!} =\frac{0.075\times7.56}{1}=0.1943$

Compute the probabilities for the rest of the values of X in the similar way.

The probabilities are shown in the table.

On comparing the two probability tables, it can be seen that the Poisson distribution can be used to approximate the distribution of the number of hurricanes each season. This is because for every value of X the Poisson probability is approximately equal to the empirical probability.

5 0

3 years ago

What is the next number in the pattern below? 3, 5, 9, 15, 23, ___ 31 33 35 37

stich3 [128]

The answer is 33.............

4 0

3 years ago

Richard practiced piano each of 3 piano solos for 5/12 hour. How long did he practice in all? Please show how to figure

Aleonysh [2.5K]

3 piano solos....each is 5/12 hr....
u can either add : 5/12 + 5/12 + 5/12 = 15/12 = 1 1/4 hrs

or u could multiply : 3 * 5/12 = 15/12 = 1 1/4 hs

either way....same answer

6 0

2 years ago

i have two points, (3,5) and (2,18) i need to find the exponential equation using these points. how do i do this?

Flauer [41]

Answer: y = (5832/25)*(5/18)^x

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

Explanation:

Any general exponential function is of the form

y = a*b^x

Plug in (x,y) = (3,5) and we get

y = a*b^x

5 = a*b^3

If you plug in (x,y) = (2,18), then we'll get this other equation

18 = a*b^2

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

So we have this system of equations

$\begin{cases}5 = ab^3\\18 = ab^2\end{cases}$

From here, we divide the two equations straight down. The left hand sides divide to 5/18. The right hand sides divide to (ab^3)/(ab^2) which simplifies to b. The 'a' terms cancel and we subtract the exponents for the b terms.

Overall, we end up with b = 5/18

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

Use that value of b to find 'a'

18 = a*b^2

18 = a*(5/18)^2

18 = a*(25/324)

18*(324/25) = a

a = 5832/25

You could use the other equation as well to find 'a'

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

Therefore, the equation in y = a*b^x form is y = (5832/25)*(5/18)^x

To verify this, plugging in x = 3 should lead to y = 5. Similarly, plugging in x = 2 should lead to y = 18.

5 0

3 years ago

Is a the correct answer ? Or which one

Aleonysh [2.5K]

Answer:

A is correct.

Step-by-step explanation:

Plug the 12 books he bought into the equation. Then, multiply 2.25 and 12, and that's your answer. Hope this helps. Please mark Brainliest! :)

6 0

3 years ago