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3 years ago

PLEASE HELP WILL GIVE BRAINLIEST OR THANKS

Mathematics

1 answer:

ddd [48]3 years ago

7 0

Answer:

(-2,5)

Step-by-step explanation:

D must be the same height (y) as A so y= 5

D must have the same x as C so x = -2

so D = (-2,5)

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I’ll give out genius is someone can help me create a story about a graph pictured below!!

Pachacha [2.7K]

Answer:

Juan and Antonio go out on a bike ride. They both start at the same place. Antonio speeds up faster than Juan for 5 minutes, but tires out and takes a break for 2 minutes. Then the slowly gets faster and gets to 4 miles at 15 minutes. Juan starts off slower than Antonio but keeps steadily increasing in speed. He reaches 4 miles in 13 minutes.

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

The number of people in a car that crosses a certain bridge is represented by the random variable X, which has a mean value <img

nexus9112 [7]

Answer:

$E(Y) = 3 + 0.5 *2.7 = 3+1.35 = 4.35$

$Var (Y) = 0.5^2 Var (X) = 0.25 *(1.2) = 0.3$

And then we have the following parameters for the random variable Y

$\mu_Y = 4.35 , \sigma^2_Y = 0.3$

And the best option is:e. mean = $4.35, variance = $ .30.

Step-by-step explanation:

For this case we know the following info " The toll on the bridge is $3.00 per car plus $ .50 per person in the car"

So then we can create the following linear function:

$Y = 3 + 0.5 X$

Where Y represent the total amount of money that is collected from a car. And X represent the number of people in the car.

We have the parameters for the random variable X given by:

$E(X) = \mu_X = 2.7 , \sigma^2_x = 1.2$

So then we can find the expected value for the random variable Y like this:

$E(Y) = 3 + 0.5 E(X)$

And if we replace the expected value for X we got this:

$E(Y) = 3 + 0.5 *2.7 = 3+1.35 = 4.35$

Now we can find the variance for the random variable Y like this:

$Var (Y) = Var (3) + 0.5^2 Var(X) + 2 Cov(3, 0.5X)$

We know that for a number we don't have variance since is a constant and the covariance between a number and a random variable is 0 so then we have just this for the variance of Y:

$Var (Y) = 0.5^2 Var (X) = 0.25 *(1.2) = 0.3$

And then we have the following parameters for the random variable Y

$\mu_Y = 4.35 , \sigma^2_Y = 0.3$

And the best option is:e. mean = $4.35, variance = $ .30.

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3 years ago

Mark recorded the growth of a plant over 8 weeks. The equation y=0.2x+2 represents the height y, in inches, after x weeks.

klio [65]

Answer:

Step-by-step explanation:

The equation representing the growth of the plant after x weeks is expressed as

y = 0.2x+2

Where

x represents the number of weeks.

y represents the height of the plant after x weeks in inches.

The height of the plant after week 3 was about 2.6 inches. We can check by substituting x = 3 into the equation. It becomes

y = 0.2 × 3 + 2 = 2 + 0.6 = 2.6 inches. It is correct.

B is incorrect.

The height of the plant after week 9 was about 3.8 inches. We can check by substituting x = 9 into the equation. It becomes

y = 0.2 × 9 + 2 = 2 + 1.8 = 3.8 inches. It is correct.

D is incorrect

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3 years ago

Prove that 1 1 1 2 + + = cot sin . θ cosecθ θ

AnnyKZ [126]

Answer:

Step-by-step explanation:Why would I wanna do that for you,Wheres your manners

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4 years ago

A number less 24 is -1. Find the number. a) 23 b) 25 c) -25 d) -23

Flauer [41]

Answer:

a) 23

Step-by-step explanation:

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3 years ago