Help with all of please I don’t understand but if you do all them it’s 15 points IF YOU DONT KnOW DONT ANSWER IT Please thanks have a nice day :)

The positive value of x is 6

An index, or power, is the small floating number that appears after a number or letter.

For example, x⁵ is an exponent expression. 5 is the index or power and x is the base. There are some rules that guides Indices.

25^(2x) = 5^(x²-12)

= 5^(4x) = 5^(x²-12

4x = x²-12

x²-4x -12 = 0

x² -6x +2x -12 = 0

(x²-6x) (2x-12) = 0

x( x-6) 2( x-6) = 0

(x+2)(x-6) = 0

x+2 = 0 or x-6 = 0

x = -2 or +6

therefore the positive value of x is 6

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The probability of out of any two students chosen at random, one student will be absent while the other is present is 29/450 or approximately 0.064.

Let's denote the event that a student is absent as A and the event that a student is present as P.

The probability of a student being absent is P(A) = 1/30, which means the probability of a student being present is P(P) = 29/30.

We want to find the probability that out of any two students chosen at random, one student will be absent while the other is present.

There are two possible cases for this event:

The first student is absent and the second student is present

The first student is present and the second student is absent

Let's calculate the probability of each case separately:

Case 1: The probability of the first student being absent is P(A) = 1/30. The probability of the second student being present is P(P) = 29/30. Therefore, the probability of the first student being absent and the second student being present is:

P(A and P) = P(A) × P(P) = (1/30) × (29/30) = 29/900

Case 2: The probability of the first student being present is P(P) = 29/30. The probability of the second student being absent is P(A) = 1/30. Therefore, the probability of the first student being present and the second student being absent is:

P(P and A) = P(P) × P(A) = (29/30) × (1/30) = 29/900

The total probability of one student being absent and the other being present is the sum of the probabilities of the two cases:

P = P(A and P) + P(P and A) = (29/900) + (29/900) = 58/900

Simplifying the fraction by dividing both the numerator and denominator by 2, we get:

P = 29/450

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Answer:

Step-by-step explanation:

A jar of 150 jelly beans contains 22 red jelly beans, 38

yellow, 20 green, 28 purple, 26 blue, and the rest are orange.

Let B = the event of getting a blue jelly bean

Let G = the event of getting a green jelly bean.

Let O = the event of getting an orange jelly bean.

Let P = the event of getting a purple jelly bean.

Let R = the event of getting a red jelly bean.

Let Y = the event of getting a yellow jelly bean.

Find P(P).

Answer:

6 out of 20 chance

Or you can write it like this 6/20 or 6:20

Step-by-step explanation:

we add all of the jelly beans together to see how many are in the jar

6+5+4+5

20

Since there are 6 red jelly beans it is a 6 out 20 chance

Hopes this helps please mark brainliest

The explicit formula for f^-1 is (x-3)^(1/4) and this is obtained by switching the roles of x and y and solving for y in terms of x.

To find the inverse function of f(x)=x^4+3, we need to switch the roles of x and y, and solve for y.
Let y = x^4+3
Subtract 3 from both sides to get:
y - 3 = x^4
Take the fourth root of both sides to isolate x:
(x^4)^(1/4) = (y-3)^(1/4)
Simplify:
x = (y-3)^(1/4)
So the inverse function of f(x) is:
f^-1 (x) = (x-3)^(1/4)
This is the explicit formula for the inverse function of f(x).
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Answer:

6.00, based on a couple of assumptions.

Step-by-step explanation:

4 x 6 = 24

2 x 2 = 4

24/4 = 6.00

I rounded the two top numbers to the nearest whole number to make multiplication easy:  4 x 6 = 24.  I know this is slight larger than the actual value, by (0.17)*(0.04) or less than 0.007,  Close enough to start.

Round the denominator to 2:  2x2 = 4

24/6 = 4.00 I don't know for sure this is correct to 3 sig figs, but I don't know how else one can do this without a calculator.

Answer:

SA: 456

V: 408

Step-by-step explanation:

To find the volume of this prism, you first need to find the area of the triangular base. The base has dimensions 6 by 8, and since it's a triangle, the area of the base is 6*8/2=24. Multiplying this by the length of the prism, you get a volume of 24*17=408. For the surface area, you need to find and add together the areas of all of the surfaces. We have already determined that the area of the two triangular bases are 24. The rectangle formed by the leg with length 6 has area 6*17=102, the one with length 8 has area 136, and the hypotenuse has area 170. Adding all of this together, you get a surface area of 24+24+102+136+170=456 square centimeters. Hope this helps!

Answer:

The answer is 2

Step-by-step explanation:ckhg

1 added by 1 = 2.                hk,khgkhdgkgdlkg

Thanks for the free points! :D

Answer:

B ?

Step-by-step explanation:

A standard normal random variable (Z) has a mean of 0 and a standard deviation of 1. The probability of Z being greater than 0 is equal to the area under the normal curve to the right of 0, which is exactly half of the total area under the curve (since the curve is symmetric around the mean of 0). Therefore, P(Z>0) is equal to 0.5.

A standard normal random variable, like Z in your question, follows a standard normal distribution, which is a special type of normal distribution with a mean of 0 and a standard deviation of 1. Now, you're asked to find the probability P(Z > 0).

Since the standard normal distribution is symmetrical around the mean (0), the probability of Z being greater than 0 is equal to the probability of Z being less than 0. In other words, half of the distribution is on the right side of the mean, and the other half is on the left side.

Therefore, P(Z > 0) = 0.5, which is your answer.

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The probability distribution for the third purchase would be approximately [0.781248, 0.218752] for "special" and "b" respectively.

Based on the transition probabilities provided, we can represent the purchase patterns for the two brands of toothpaste as a Markov process. Let's denote the two brands as "special" (S) and "b" (B).

The rows represent the current state, and the columns represent the next state. The entry at row i and column j represents the probability of transitioning from state i to state j.

For example, according to the transition matrix:

The probability of transitioning from "special" (S) to "special" (S) is 0.92.

The probability of transitioning from "special" (S) to "b" (B) is 0.08.

The probability of transitioning from "b" (B) to "special" (S) is 0.04.

The probability of transitioning from "b" (B) to "b" (B) is 0.96.

Using this transition matrix, we can analyze the purchase patterns over time. For example, if we start with a customer purchasing the "special" brand, the probability distribution for the next purchase would be [0.92, 0.08] for "special" and "b" respectively. If we continue this process, we can calculate the probabilities for multiple purchases in the future.

Certainly! Let's continue analyzing the purchase patterns using the given transition probabilities.

Let's consider the initial state where a customer purchases the "special" brand of toothpaste. We can calculate the probabilities for the next purchase after several time steps.

Time step 1:

If the customer purchased "special" toothpaste initially, the probability distribution for the next purchase would be [0.92, 0.08] for "special" and "b" respectively.

Time step 2:

To calculate the probabilities for the second purchase, we multiply the previous probability distribution by the transition matrix:

Hence, the probability distribution for the second purchase would be approximately [0.8464, 0.1536] for "special" and "b" respectively.

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Answer:

the answer is A

Step-by-step explanation:

your welcome sorry if im wrong

Answer:

each notebook would cost $4

Step-by-step explanation:

21-13=8.    8/2=4

In 286 ways are there to distribute seven identical apples and six identical pears to three distinct people.

There are 7 identical apples and 6 identical pears.

So total number of fruits here = 7+6 = 13 identical fruits

The number of ways to distribute 13 fruits in three distinct people is given by \(=^{13}C_3=286\) ways.

Hence the number of ways is 286.

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The result of inverse trigonometric function are: cos, tan^-1, sin, tan^-1(5), sin^-1, tan^-1(-1), sin^-1(1), cos, sin, cos^-1(0), tan(13), sin^-1(1), cos, cos^-1.

Inverse trigonometric functions are used to determine the angle measures of a right triangle given the length of two sides. In this problem, we are matching the inverse tangent solutions to the corresponding trigonometric problems. The inverse tangent function, tan^-1(x), gives the angle whose tangent is x.

Therefore, matching tan^-1(1/6) with problem number 2 means finding the angle whose tangent is 1/6. Similarly, matching cos^-1(0.5) with problem number 10 means finding the angle whose cosine is 0.5. The other inverse trigonometric functions, such as sin^-1(x) and cos^-1(x), give the angles whose sine and cosine are x, respectively.

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In polar coordinates, the radial distance "r" is defined as the distance from the origin to a point in the plane. Since distance cannot be negative, we only consider the positive square root of 3 in the range for this problem. So, the correct range for "r" is 0 ≤ r ≤ √3, and negative square root of 3 is not included because it doesn't represent a valid distance in polar coordinates.

To find the volume of the given solid enclosed by the hyperboloid −x2 − y2 + z2 = 6 and the plane z = 3 using polar coordinates, we need to express the equation of the hyperboloid in terms of polar coordinates.

Substituting x = rcosθ and y = rsinθ, we get:

−r2cos2θ − r2sin2θ + z2 = 6

Simplifying, we get:

z2 = 6 - r2

Since the plane z = 3 intersects the hyperboloid, we have:

3 = √(6 - r2)

Solving for r, we get:

r = √3

Hence, the range for r is 0 ≤ r ≤ √3.

In summary, the negative square root of 3 is not included in the range of r because r represents a distance and cannot be negative. The volume of the solid can be found by integrating the function f(r,θ) = √(6 - r2) over the range 0 ≤ r ≤ √3 and 0 ≤ θ ≤ 2π using polar coordinates. The result will be in cubic units and can be obtained by evaluating the integral.

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Answer:

42

Step-by-step

you have to add all hopes this helps

Answer:

Step-by-step explanation:

lol put ur books or notes or whatever behind the device and cheat

BUT I really don’t advice u to cheat just try preparing for the exam or do as much as u can and don’t waste ur time at least u would know something while solving the exam.

Answer:

19/38 can be simplified to 1/2

Step-by-step explanation:

Answer:

y= 1/2x + -3

Step-by-step explanation:

it starts at -3, and climbs by 1/2 points every time. (remember, 1/2 can be read as rise/run. Rise one, run 2)

There are 21 different ways to select a team consisting of 2 second graders and 1 first grader from among the students at the school.


To select a team consisting of 2 second graders and 1 first grader from a group of 2 second graders and 7 first graders, we need to use combinations. A combination is a way of selecting objects from a larger set where order does not matter. In this case, we need to select 2 second graders and 1 first grader from a group of 2 second graders and 7 first graders.
To calculate the number of ways to select 2 second graders from a group of 2, we can use the formula for combinations:
nCr = n! / r!(n-r)!
where n is the total number of objects, r is the number of objects we want to select, and ! means factorial (e.g. 5! = 5 x 4 x 3 x 2 x 1 = 120).
Applying this formula to our problem, we get:
2C2 = 2! / 2!(2-2)! = 1
There is only 1 way to select 2 second graders from a group of 2.
To calculate the number of ways to select 1 first grader from a group of 7, we can use the same formula:
7C1 = 7! / 1!(7-1)! = 7
There are 7 ways to select 1 first grader from a group of 7.
Finally, we can calculate the total number of ways to select a team consisting of 2 second graders and 1 first grader by multiplying the number of ways to select 2 second graders by the number of ways to select 1 first grader:
1 x 7 = 7
Therefore, there are 7 different ways to select a team consisting of 2 second graders and 1 first grader from among the students at the school.

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Solution

on the second quadrant

Now cos a

Answer:

48 years.

Step-by-step explanation:

Consider the complete question is "The ratio of ages of kissi and esinam is 3:5 and that of esinam and lariba is 3:5. The sum of ages of all 3 is 147 years. whats the age difference between oldest and youngest ?"

It is given that

Kissi : Esinam = 3:5 = 9:15

Esinam : Lariba = 3:5 = 15:25

So, the combined ratio is Kissi : Esinam : Lariba = 9:15:25

Let ages of Kissi, Esinam, Lariba are 9x, 15x and 25x.

Sum of ages of all 3 is 147 years.

\(9x+15x+25x=147\)

\(49x=147\)

\(x=3\)

The value of x is 3. So, the age of all three are

\(Kissi=9x=9(3)=27\)

\(Esinam=15x=15(3)=45\)

\(Lariba=25x=25(3)=75\)

Since Lariba is oldest and Kissi is youngest, therefore, the difference between their ages is

\(75-27=48\)

Hence, difference between oldest and youngest is 48 years.

Answer:

SA = 94 ft²

Step-by-step explanation:

To find the surface area of a rectangular prism, you can use the equation:

SA = 2 ( wl + hl + hw )

SA = surface area of rectangular prism

l = length

w = width

h = height

In the image, we are given the following information:

l = 4

w = 5

h = 3

Now, let's plug in the information given to us to solve for surface area:

SA = 2 ( wl + hl + hw)

SA = 2 ( 5(4) + 3(4) + 3(5) )

SA = 2 ( 20 + 12 + 15 )

SA = 2 ( 47 )

SA = 94 ft²

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To determine how many subjects in the population and sample possess the characteristic, we can use proportions.

In the population:

Total population = 19,100

Proportion with the characteristic = 34% = 0.34

Number of subjects in the population with the characteristic:

= Proportion with the characteristic * Total population

= 0.34 * 19,100

≈ 6,514 subjects

In the sample:

Sample size = 150

Proportion with the characteristic = 30% = 0.30

Number of subjects in the sample with the characteristic:

= Proportion with the characteristic * Sample size

= 0.30 * 150

= 45 subjects

Therefore, approximately 6,514 subjects in the population possess the characteristic, and 45 subjects in the sample possess the characteristic.

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Answer:

81

Step-by-step explanation:

a+4

Let a = 87

87+4

81

The correct set of possible results would be (0, 1, 0, 0), (1, 2, 1, 0) and (1, 2, 0, 1).

Your approach seems to be correct, but there seems to be a minor mistake in your final list of possible solutions. Let's go through the steps to clarify.

Given the initial conditions z=t=0, you obtained a partial solution (0,1,0,0).

Next, you solved the homogeneous equations for z=1 and t=0, which resulted in a solution (1,1,1,0).

Similarly, solving the homogeneous equations for z=0 and t=1 gives another solution (1,1,0,1).

To find the general solution, you combine the partial solution with the solutions obtained in the previous step, using parameters a and b.

(0,1,0,0) + a(1,1,1,0) + b(1,1,0,1)

Expanding this expression, you get:

(0+a+b, 1+a+b, 0+a, 0+b)

Simplifying, you obtain the following set of solutions:

(0, 1, 0, 0)

(1, 2, 1, 0)

(1, 2, 0, 1)

Therefore, the correct set of possible results would be:

(0, 1, 0, 0)

(1, 2, 1, 0)

(1, 2, 0, 1)

Note that (0, 1, 1, 1) is not a valid solution in this case, as it does not satisfy the initial condition z = 0.

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