Hey can you please help me posted picture of question

Answers

Answer 1

Answer: To solve the problem shown in the figure above you must keep on mind the following information:

1. The figure shows a parabola whose vertex is (0,0).

2. The x² indicates that the red parabola shown in the figure is vertical

3. and the sign - indicates that the red parabola opens down.

Therefore, you can conclude that the red parabola has the equation f(x)=-x²

So, the answer is B.

Answer 2

Answer: If we observe the graph of F(x) and G(x), F(x) can be obtained by shifting the graph of G(x) 4 units down.

Shifting 4 units down means subtracting 4 from the function value.

So, G(x) = 4 - x²

Thus,

F(x) = G(x) - 4
F(x) = 4 - x² - 4 = - x²

Therefore, the correct answer is option B

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I need help with this one pleaseeeeeee (first will get brainliest)
In a recent survey it was found that Americans drink an average of 23.2 gallons of bottled water in a year. If the standard deviation is 2.7 gallons and the variable is normally distributed, find the probability that a randomly selected American drinks more than 25 gallons of bottled water in a year. What is the probability that the selected person drinks between 22 and 30 gallons

What is the difference x +5/ x +2 - x + 1/x ^2 + 2x?

Answers

ANSWER
The difference is,

$\frac{ {x}^(2) + 4x - 1}{ {x}^(2) + 2x}$

EXPLANATION

To find the difference, we just have to simplify the expression.

The given expression is

$(x + 5)/(x + 2) - \frac{(x + 1)}{ {x}^(2) + 2x}$

We factor the denominator of the second fraction to get,

$=(x + 5)/(x + 2) - ((x + 1))/( x( x+ 2))$

We can now see clearly that the LCM is

$x(x + 2)$

We collect LCM to get,

$=(x(x + 5) - (x + 1))/( x( x+ 2))$
We now expand the bracket to obtain,

$=\frac{ {x}^(2) + 5x - x - 1}{ {x}^(2) + 2x}$

This gives us,

$=\frac{ {x}^(2) + 4x - 1}{ {x}^(2) + 2x}$

The difference will be given by:
(x +5)/ (x +2) - (x + 1)/(x ^2 + 2x)
=(x +5)/ (x +2) - (x + 1)/[x (x + 2)]
the LCM is x(x+2)
thus the difference will be:
[x(x+5)-(x+1)]/(x (x + 2))
=[x^2+5x-x-1]/[x(x+2)]
=(x^2-4x-1)/[x(x+2)]

Answer:(x^2-4x-1)/[x(x+2)]

On the package for a certain brand of spinach seeds there is a guarantee that, if the printed instructions are followed, of planted seeds will germinate. A random sample of seeds is chosen. If these seeds are planted according to the instructions, find the probability that of them germinate.

Answers

The question is incomplete. Here is the complete question.

On the package for a certain brand of spinach seeds there is a guarantee that, if the printed instructions are followed, 63% of planted seeds will germinate. A random sample of 9 seeds is chosen. If these seeds are planted according to the instructions, find the probability that 4 or 5 of them germinate. Do not round your intermiediate computations, and round your answer to three decimal places.

Answer: P(4<X<5) = 0.624

Step-by-step explanation: The probability of a seed germinate is a BinomialDistribution, i.e., a discrete probability distribution of the number of successes in a sequence of n independents experiments.

This distribution can be approximated to normal distribution by determining the values of mean and standard deviation population:

$\mu=np$

$\sigma=√(np(1-p))$

where

n is the sample quantity

p is proportion of successes

For the spinach seeds:

Mean is

$\mu=9(0.65)$

$\mu=$ 5.85

Standard deviation is

$\sigma=√(9.0.65(1-0.65))$

$\sigma=$ 1.431

Now, use

$z=(x-\mu)/(\sigma)$

to convert into a standard normal distribution.

The probability we want is between 2 values: P(4<X<5).

Therefore, we have to convert those two values:

For X = 4:

$z=(4-5.85)/(1.431)$

z = -1.29

For X = 5:

$z=(5-5.85)/(1.431)$

z = -0.59

Using z-table:

P(X>4) = 1 - P(z< -1.29) = 0.9015

P(X<5) = P(z< -0.59) = 0.2776

The probability will be

P(4<X<5) = P(X>4) - P(X<5)

P(4<X<5) = 0.9015 - 0.2776

P(4<X<5) = 0.624

The probability of 4 or 5 seeds germinate is0.624.

Find the missing number of the unit rate

12/4=?/1

Answers

Answer: 3/1

Step-by-step explanation:

Your supposed to divide by 4 on the top and bottom.

12 4= 3

4 4 = 1

If a 5 ft tall man cast an 8 ft long shadow at the same time a tree cast a 24 ft long shadow, how tall is the tree?

Answers

Answer:

15 feet

Step-by-step explanation:

We have 2 similar right triangles with legs height and length of shadows.

height of men : length of shadows of the man = height of tree : length of shadows of the tree

5 : 8 = x : 24

8x = 5* 24

x = 5*24/8 = 15 (feet)

Answer:

15ft

Step-by-step explanation:

5 ft is to 8 ft

A ft is to 24 ft

A = 24*5/8

A = 15ft

15ft

If you flip three fair coins, what is the probability that you’ll get two tails and one head in any order?

Answers

Step-by-step explanation:

1/ 3 is the probability of getting one head

For what side length(s) is the area of an equilateral triangle equal to 30 cm?? Only enter the number, in centimeters, rounded to two decimal places. A cm ►

Answers

Answer: The sides length are 8.32 cm

Step-by-step explanation:

An equilateral triangle has all his sides of the same lenght, so we assume that the triangle has an L lenght in his sides.

The area of a triangle is $Area = (base * height)/(2)$ where the base is L, the Area is 30 and an unknown height.

To determine the height, we cut the triangle in half and take one side. By simetry, one side has a base of $(L)/(2)$ , a hypotenuse of L and a the unknown height.

Then we apply the Pythagoras theorem, this states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides, or, $hypotenuse = \sqrt{c^(2) + c^(2) }$ Where one c is $(L)/(2)$ and the other is the height.

Then we find one of the c of the equation wich will be the height.

$height = \sqrt{hypotenuse^(2)-base^(2) }$

$height = \sqrt{ L^(2) -(L)/(4) ^(2)}\nheight = \sqrt{( 3L^(2))/(4) } \n\nheight = (√(3)L )/(2)$

Finally, we use the triangle area mentioned before an find the value of L.

$30 = (L*(√(3)L )/(2) )/(2) \n\nL = \sqrt{(120)/(√(3) ) } \n\nL = 8.32 cm$

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