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alina1380 [7]
3 years ago
6

HELP DUE RIGHT NOW!!

Mathematics
2 answers:
joja [24]3 years ago
8 0

Answer:

the answer is D

Step-by-step explanation:

poizon [28]3 years ago
5 0

Answer:

Step-by-step explanation:

the correct nswer is A

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PLEASE HELP!!!
bogdanovich [222]

Answer:

  for independent A and B, P(A|B) = P(A)

Step-by-step explanation:

The definition of  conditional probability is ...

  P(A|B) = P(A&B)/P(B)

When A and B are independent, ...

  P(A&B) = P(A)·P(B)

so the conditional probability is ...

  P(A|B) = (P(A)·P(B))/P(B) = P(A) . . . . . for independent A and B

In words, when A and B are independent, the probability of A given B is the same as the probability of A. That is, the probability of B has no effect on the probability of A.

7 0
4 years ago
A savings bond currently made Jamar $2,112.64 worth of interest in 7 years. If the investment gained 5.5% annual simple interest
Anika [276]

Answer:

D; it was bought for $5,487.36

Step-by-step explanation:

Let the investment amount be $x

We use the formula for simple interest to get the interest

(2112.64-x) = (x * 5.5 * 7)/100

211264-100x = 38.5x

138.5x = 211264

x = 211264/138.5

x = 5,847.36

3 0
3 years ago
if an explosive shell can travel 500 yards in 1.5 seconds, a shell bursts with a 25 yard diameter of damage and it takes 3 secon
zzz [600]
an\ explosive\ shell\ can\ travel\ 500\ yards\ in\ 1.5\ seconds\ \ \ \rightarrow\\.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \rightarrow\ \ \ \  1000\ yards\ in\ 3\ seconds\\\\diameter = 25\ yards\ \ \ \ \ \rightarrow\ \ \ \ radius=12.5\ yards\\\\1000+12.5=1012.5\ [yards]\\\\Answer:\\ The\ farthest\ away\ a\ target\ could\ be\ hit\ with\  a\ shell\ is\ 1012.5\ yards
4 0
3 years ago
What equation shows how to use equivalent fractions to evaluate 2/5 + 3/4
Margaret [11]

Answer:

Step-by-step explanation:

Exact form: 23/20

Decimal form: 1.15

8 0
3 years ago
Use the given data to find a regression line that best fits the price-demand data for price p in dollars as a function of the de
Rufina [12.5K]

Answer:

m=-\frac{7600}{8250}=-0.921

Nowe we can find the means for x and y like this:

\bar x= \frac{\sum x_i}{n}=\frac{550}{10}=55

\bar y= \frac{\sum y_i}{n}=\frac{1042}{10}=104.2

And we can find the intercept using this:

b=\bar y -m \bar x=104.2-(-0.921*55)=104.707

So the line would be given by:

y=-0.921 x +104.707

Step-by-step explanation:

For this case we have the following data given:

Demand (x): 10,20,30,40,50,60,70,80,90,100

Price (y): 141 , 133,126, 128,113,97, 90, 82,79,53

We want to construct a linear model like this:

y = mx +b

For this case we need to calculate the slope with the following formula:

m=\frac{S_{xy}}{S_{xx}}

Where:

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}

So we can find the sums like this:

\sum_{i=1}^n x_i =550

\sum_{i=1}^n y_i =1042

\sum_{i=1}^n x^2_i =38500

\sum_{i=1}^n y^2_i =115882

\sum_{i=1}^n x_i y_i =49710

With these we can find the sums:

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=38500-\frac{550^2}{10}=8250

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}=49710-\frac{550*1042}{10}=-7600

And the slope would be:

m=-\frac{7600}{8250}=-0.921

Nowe we can find the means for x and y like this:

\bar x= \frac{\sum x_i}{n}=\frac{550}{10}=55

\bar y= \frac{\sum y_i}{n}=\frac{1042}{10}=104.2

And we can find the intercept using this:

b=\bar y -m \bar x=104.2-(-0.921*55)=104.707

So the line would be given by:

p(x)=-0.921 x +104.707

4 0
3 years ago
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