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2 years ago

URGENT PLS RESPOND!!!

Mathematics

1 answer:

Elan Coil [88]2 years ago

6 0

Answer:

$\huge\boxed{d=\sqrt{17}}$

Step-by-step explanation:

Simply use the fact that the change in x squared + the change in y squared = the distance squared. (The Pythagorean Theorem)

1^2 + 4^2 = d^2

1 + 16 = d^2

17 = d^2

d = √17

Hope it helps :)

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(Y = -x + 4), (y = 3/2x - 6)

Temka [501]

Answer:

$x = 4$

Step-by-step explanation:

$- x + 4 = \frac{3}{2} x - 6 \\ - 2x + 8 = 3x - 12 \\ 2x - 8 = - 3x + 12 \\ 5x = 20 \\ x = 4$

8 0

3 years ago

g If the economy improves, a certain stock stock will have a return of 23.4 percent. If the economy declines, the stock will hav

dusya [7]

Answer:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

Step-by-step explanation:

We can define the random variable of interest X as the return from a stock and we know the following conditions:

$X_1 = 23.4 , P(X_1) =0.67$ represent the result if the economy improves

$X_2 = -11.9 , P(X_1) =0.33$ represent the result if we have a recession

We want to find the standard deviation for the returns on the stock. We need to begin finding the mean with this formula:

$E(X) = \sum_{i=1}^n X_i P(X_i)$

And replacing the data given we got:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

7 0

2 years ago

A top swimmer would be able to swim across a 25-meter pool in about 1/5

Anni [7]

Answer:

125 m/min

Step-by-step explanation:

Find the rate (speed) as follows:

25 meters

--------------------- = (125/1) meters/min = 125 m/min

(1/5) minute

This is equivalent to about 380 ft/min

7 0

3 years ago

WILL GIVE BRANLIEST PLEASE HELP URGENT!!!!!!!

sweet [91]

Answer:

X=-5/6 or -0.83

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Do you solve math in parentheses last or first

Flura [38]

It has to be solved first.

Step-by-step explanation:

Parentheses has to be solved first according to the BODMAS Principle which is Brackets Open Division Multiplication Addition and Subtraction
If this is not followed, the answers will be different and will not get the right answer.

It is the same as PEDMAS which is Parenthesis Exponents Division Multiplication Addition and Subtraction

8 0

3 years ago