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3 years ago

5

Adding 5 to a number and then doubling the result gives the same answer as multiplying the number by 5 and then adding 1. What i

s the number? ill give my sc and disc if you answer

1 answer:

chubhunter [2.5K]3 years ago

6 0

32-54+4+ 7y=4

boom son

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About 16 % of the population of a large country is allergic to pollen. If two people are randomly selected, what is the probabil

Vinvika [58]

Answer:

(a) 0.0256

(b) 0.2944

Step-by-step explanation:

For solving this exercise we can apply the binomial distribution. The equation that give as the probability is:

$P(x,n,p)=(nCx)*p^{x} *(1-p)^{n-x}$

Where n is the number of identical events, p is the probability that the event has a success and x is the number of success in the n identical events.

Additionally, nCx is calculated as:

$nCx=\frac{n!}{x!(n-x)!}$

So, in this case we have 2 identical events because we are going to select two people randomly and the probability p of success is the probability that the person is allergic to pollen and this probability is 16%.

Then, for the first case, x is 2 because their are asking for the probability that both are allergic to pollen. Replacing the values of x, n and p we get:

$P(2,2,0.16)=(2C2)*0.16^{2} *(1-0.16)^{2-2}$

P(2,2,0.16)=0.0256

For the second case, their are asking for the probability that at least one is allergic to pollen, that means that we need to sum the probability that both are allergic to pollen with the probability that just one is allergic to pollen.

Using the same equation to calculate P(1,2,0.16) we get:

$P(1,2,0.16)=(2C1)*0.16^{1} *(1-0.16)^{2-1}$

P(1,2,0.16)=0.2688

So, the probability that at least one person is allergic to pollen is 0.2944 and it is calculated as:

0.0256 + 0.2688 = 0.2944

7 0

3 years ago

The figure shows a kite ABCD where AB = AD, BC = CD and the diagonals AC and BD intersect at E.

podryga [215]

Answer:

ABD

Step-by-step explanation:

Mark brainliest today afternoon message was not going that account was deleted

this is my new account ha Aryan hu

5 0

2 years ago

As the numbers of phones produced increases, will the working rate ever get to 100%? Explain

icang [17]

Some things you need in your respond is:

- Although the percentage might eventually round to 100%, it is not possible to have 100% of the phones working.
- This is because the model began when only 3 out of 10 phones were working, so there are 7 phones that were not working.
- In other words, the numerator and denominator of the expression are never the same, so the expression is never equal to 1 or 100%.

7 0

3 years ago

Read 2 more answers

Please help meeee (1/2) to the 4th power

Karolina [17]

Answer:

$\frac{1}{16}$

Step-by-step explanation:

$\frac{1}{2} *\frac{1}{2} *\frac{1}{2} *\frac{1}{2} =$ $\frac{1}{16}$

$\frac{1}{2}*\frac{1}{2} =\frac{1}{4}$

$\frac{1}{4} *\frac{1}{2} =\frac{1}{8}$

$\frac{1}{8}*\frac{1}{2}=\frac{1}{16}$

4 0

3 years ago

WILL MARK BRAINIEST

muminat

Answer:

$f(x) = -4x - 2$

Step-by-step explanation:

To derive the function rule in slope-intercept form, $f(x) = mx + b$ , we need to find the slope, m, and the y-intercept, b, of the graph given.

Using two points on the line, (-1, 2) and (0, -2), find slope (m) as shown below:

$m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-2 - 2}{0 -(-1)} = \frac{-4}{1} = -4$

m = -4

The line intercepts the y-axis at y = -2, therefore the y-intercept, b, = -2.

Substitute m = -4, and b = -2 into $f(x) = mx + b$ .

The function rule in slope-intercept form would be:

$f(x) = -4x +(-2)$

$f(x) = -4x - 2$

7 0

3 years ago