Identify the coefficient in the expression 7y + 8.
A. 8
B. 7y
C. 7
D. Y
Help please!!! I’ll give brainlist

The expected value of X or E(X) is 2.45.

To find the expected value of a random variable X, denoted by E(X), we use the formula:

E(X) = ∑[x*P(X=x)]

where x is the value of X and P(X=x) is the probability of X taking the value x.

Using this formula, we can calculate the expected value of X based on the probability distribution table given to us.

X    1    2    3    4

P(X)   0.25 0.30 0.20 0.25

E(X) = (1 * 0.25) + (2 * 0.30) + (3 * 0.20) + (4 * 0.25)

= 0.25 + 0.60 + 0.60 + 1.00

= 2.45

Therefore, the expected value of X is 2.45.

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The probability distribution of the random variable X is given in the following table. Find the expected value of X . (Round your answer to 4 decimal places.) x -2 -1 0 1 2 P(X =x)  

a. 3

b. 2.45

c.6.9

d.1.2

Answer:

1312 quarts

Step-by-step explanation:

1 cup = 4 quarts

328 ^ 4 = 1312

Answer:

Step-by-step explanation:

Each elf gets 1 cup of milk

Number of elves = 328

1 quart = 4 cups ⇒ 1 cup = 1/4 quart

Required volume of milk is:

82 quarts of milk to be ordered

The solution to the system of equations is x = -8/7, y = 4/7 and z = -2/7

The system of equations is given as

2x - y + 2z = -6

-3y + z = -2

2x - 3z = -4

Subtract 2x - 3z = -4 from 2x - y + 2z = -6

This is represented as

(2x - y + 2z = -6) - (2x - 3z = -4)

This gives

- y + 5z = -2

Multiply - y + 5z = -2 by 3

-3y + 15z = -6

Subtract -3y + 15z = -6 from -3y + z = -2

This is represented as

(-3y + z = -2) - (-3y + 15z = -6)

This gives

-14z = 4

Divide by -14

z = -2/7

Substitute z = -2/7 in - y + 5z = -2

- y - 5 * 2/7 = -2

This gives

- y - 10/7 = -2

Rewrite as:

y = 2 - 10/7

Evaluate

y = 4/7

Substitute z = -2/7 in 2x - 3z = -4

2x - 3 * 4/7 = -4

This gives

2x - 12/7 = -4

So, we have:

2x = 12/7 - 4

Evaluate

2x = -16/7

Divide by 2

x = -8/7

Hence, the solution to the system of equations is x = -8/7, y = 4/7 and z = -2/7

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The equation of the line that passes through (0,3) and (7,0) is y=−37x+3 y = − 3 7 x + 3.

Answer:

Step-by-step explanation:

Answer:

$25.50

Step-by-step explanation:

8 tickets cost $204.

$204 ÷ 8 = $25.50

Answer: y = 2x + 7

Step-by-step explanation:

Given line = -1/2

given line = y = -1/2x + 7

Perp line = y = 2x + 7

No, 34.05 is not greater than 34.59.

When comparing two numbers, we look at their digits from left to right.

In this case, both numbers start with 34, which means they have the same value in the tens place.

However, when we move to the decimal part, 0.05 is smaller than 0.59.

Therefore, 34.05 is smaller than 34.59.

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Answer:

x = 8

Step-by-step explanation:

51° = 4x + 19

32° = 4x

8 = x

Answer:

x = 8

Step-by-step explanation:

well, 4 x something + 19 = 51

51-19=32

32/4=8

so your answer is 8

4 x 8 + 19 = 51

Answer:

help me to find Xian pleaseee:( i miss him so much:(

sorry for answering Non sense po i hope u understand me ty po!

The value of x that makes the line containing (1,2) and (5,3) perpendicular to the line containing (x,4) and (3,0) is x = 2.

To determine the value of x such that the line containing (1,2) and (5,3) is perpendicular to the line containing (x,4) and (3,0), we need to find the slope of both lines and apply the concept of perpendicular lines.

The slope of a line can be found using the formula:

slope = (change in y) / (change in x)

For the line containing (1,2) and (5,3), the slope is:

slope1 = (3 - 2) / (5 - 1) = 1 / 4

To find the slope of the line containing (x,4) and (3,0), we use the same formula:

slope2 = (0 - 4) / (3 - x) = -4 / (3 - x)

Perpendicular lines have slopes that are negative reciprocals of each other. In other words, if the slope of one line is m, then the slope of a line perpendicular to it is -1/m.

So, we can set up the equation:

-1 / (1/4) = -4 / (3 - x)

Simplifying this equation:

-4 = -4 / (3 - x)

To remove the fraction, we can multiply both sides by (3 - x):

-4(3 - x) = -4

Expanding and simplifying:

-12 + 4x = -4

Adding 12 to both sides:

4x = 8

Dividing both sides by 4:

x = 2

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By multiplying the two fractions we get 2 / 9, and by adding we get 1.

In arithmetic, a product is the result of multiplication or an expression that identifies elements to be improved.

In math, multiply the method to add equal corporations. Whilst we multiply, the range of factors in the institution will increase. the two factors and the product are parts of a multiplication problem. Within the multiplication trouble, 6 × 9 = 54, the numbers 6 and 9 are the factors, at the same time as the range 54 is the product.

Multiplication is defined as calculating the end result of repeated additions of two numbers. An instance of multiplication is 4 instances 2 equals 8.

By multiplying the two fractions,

= 3 / 9 * 6 / 9

= 2 / 9

By adding the two fractions,

= 3 / 9 + 6 / 9

= 9 / 9

= 1

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The equation that could be used to represent this situation, where x is the course fee and R(x) is the total revenue, is: R(x) = 250000 + 375x - 2.5x²

Equations are mathematical statements with two algebraic expressionsοn either sideοf an equals (=) sign. It illustrates the equality between the expressions writtenοn the left and right sides. To determine the valueοf a variable representing an unknown quantity, equations can be solved. A statement is not an equation if there is no "equal to" symbol in it. It will be regarded as an expression.

N(x) = 625 + 2.5x

The revenue R(x) will be the productοf the numberοf students enrolled and the fee charged per student. The fee charged per student will be (400 - x) dollars. So, the revenue function can be represented as:

R(x) = (625 + 2.5x)(400 - x)

Simplifying the expression, we get:

R(x) = 250000 + 375x - 2.5x²

Therefore, the equation that could be used to represent this situation, where x is the course fee and R(x) is the total revenue, is:

R(x) = 250000 + 375x - 2.5x²

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Answer:

Percentage Calculator: 18 is what percent of 53? = 33.96.

Step-by-step explanation:

that is your answer

Answer:  

36

Step-by-step explanation:

You can see that the rectangle can be broken into a square to match the top square.  Use 3^2 to get 9 and multiply by two to get the area of both squares, 18.  Now use L*W to find the area of the rectangle, you should get 18 as well.  Add to get 36.  

The resulting matrix after the row operation is given as follows:

\(\left[\begin{array}{ccc}-6&1&-8\\2&9&7\\-7&5&2\\2&8&-8\end{array}\right]\)

The matrix in the context of this problem is defined as follows:

\(\left[\begin{array}{ccc}-6&1&-8\\-7&5&2\\2&9&7\\2&8&-8\end{array}\right]\)

The row operation is given as follows:

R2 <-> R3.

Meaning that we must exchange the elements on the rows 2 and 3.

The rows of the matrix are given as follows:

Exchanging the rows, the resulting matrix is given as follows:

\(\left[\begin{array}{ccc}-6&1&-8\\2&9&7\\-7&5&2\\2&8&-8\end{array}\right]\)

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To get the Prime factorization of 3000 we need to multiply by 5.

When the number is factored using prime numbers, or primes, the process is known as prime factorization. The easiest method to determine the prime factors of a given number is to keep dividing the given number by the prime factors until we will get 1.

For example, the Prime factorization of 45 is given below

=> 45/5 = 9, 9/3 = 3,  3/3 = 1

=> 45 = 5 × 3 × 3

Here we have

The prime factorization of 600 is 2 x 2 × 2 × 3 × 5 × 5

Let us assume that on multiplying with p,

we will get the factorization of 3000

=> 2 x 2 × 2 × 3 × 5 × 5 × p = 3000

=> p = \(\frac{3000}{2\times 2 \times 2 \times 3 \times 5 \times 5}\)  

Her 2 x 2 × 2 × 3 × 5 × 5 = 600

=> p = \(\frac{3000}{600}\)

=> p = 5  

Therefore,

To get the Prime factorization of 3000 we need to multiply by 5.

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Answer:

a) 3 kilograms

b) 5.7 kilograms

Step-by-step explanation:

Z-score:

In a set with mean \(\mu\) and standard deviation \(\sigma\), the zscore of a measure X is given by:

\(Z = \frac{X - \mu}{\sigma}\)

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

\(\mu = 3.89, \sigma = 0.68\)

We have to find X for both values of Z.

a) z = -1.35

\(Z = \frac{X - \mu}{\sigma}\)

\(-1.35 = \frac{X - 3.89}{0.68}\)

\(X - 3.89 = -1.35*0.68\)

\(X = 3\)

3 kilograms

b) z = 2.64

\(Z = \frac{X - \mu}{\sigma}\)

\(2.64 = \frac{X - 3.89}{0.68}\)

\(X - 3.89 = 2.64*0.68\)

\(X = 5.7\)

5.7 kilograms

The calculation shows that coupon B is better for Bill as it gives a cheaper value.

A percentage is a value or ratio that may be stated as a fraction of 100. If we need to calculate a percentage of a number, we should divide it's entirety and then multiply it by 100.

Since Bill has two coupons for a chair. Coupon A: $9 rebate on a $38 chair. The amount of the chair will be:

= $38 - $9

= $29

Coupon B: 30% off of a chair $38. This will be:

= $38 - (30% × $38)

= $38 - $11.40

= $26.60

Therefore, the prices are different as coupon B is better.

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Complete question

Bill has two coupons for a chair. Coupon A: $9 rebate on a $38 chair Coupon B: 30%off of a chair $38. Will the give same amount?

Answer:

it just takes longer

Step-by-step explanation:

you count by 1 from 100 until 1000

Answer:

It just take more time.

Step-by-step explanation:

The more 0's the more you count

Answer:

See below

Step-by-step explanation:

5 + 8 = 13  divisions      5/13  is one part the other is 8/13

5/13 * 520=200  

            the other  is    520-200= 320

Answer:

(x – 4)^2 + (y + 7)^2 = 16

Step-by-step explanation:

The formula of a circle is:

(x – h)^2 + (y – k)^2 = r^2

(h, k) represents the coordinates of the center of the circle

r represents the radius of the circle

If you plug in the given information, you get:

(x – 4)^2 + (y – (-7))^2 = 4^2

which simplifies into:

(x – 4)^2 + (y + 7)^2 = 16

Answer:

21.69

Step-by-step explanation:

you need to add the sales tax to 1 to find the answer. (1.085*19.99=21.69)

Answer:

$21.69 is the total cost

Step-by-step explanation:

you just have to do this

(1.085*19.99=21.69)

and thats how you get $21.69

Hope this helps

the value of the investment when she retires is $26434.92.

Compound interest is when you earn interest on both the money you've saved and the interest you earn.

Formula:

A = P(1 + {r}/{n})^{n.t}

A = final amount

P = initial principal balance

r = interest rate

n = number of times interest applied per time period

t = number of time periods elapsed

here, we have,

given that,

Leilamade a one-time investment of $12 000.00 in a

registered retirement savings plan (RRSP) at 2.65%, compounded

semi-annually.

She plans to withdraw the money when she retires in 30

years.

So, she get finally is,

using the formula we get,

$26434.92

hence,  the value of the investment when she retires is $26434.92.

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Answer: y-8=8/9(x-9)

Step-by-step explanation:

If it is parallel line that means that their gradient must be the same.

Point slope formula: y - y1 = m (x - x1)

m= gradient

y1 = y point

x1 = x point

y-8=8/9(x-9)

Answer: No, figure A is not a scale copy of figure B.