BRAINLY!!!- if a=7, b=8, and c=9.2 is this a right triangle? why?

Answer: 6/13

Step-by-step explanation:

6/13 is the simplest form

Answer:

Hi buddy

Step-by-step explanation:

step 1: just simply subtract the numerators because the denominators are the like numbers

:8-2=6

step 2 the answer is

6/13

NOTE: there Is no simple form because there is no simple form for 13

The probability of obtaining the face showing a six between 15 and 20 times out of 100 rolls of the die ≈ 0.3106 and the probability of the sum of the face values of the 100 trials being less than 300 ≈ 0.1635.

To cumulate the probability of the face showing a six turns up between 15 and 20 times when rolling a six-sided die 100 times, we can use the normal approximation to the binomial distribution.

The probability of rolling a six on a fair six-sided die is 1/6, and the probability of not rolling a six is 5/6.

Let's define a random variable X as the number of times a six appears when rolling the die 100 times.

X follows a binomial distribution with parameters n = 100 (number of trials) and p = 1/6 (probability of success).

To use the normal approximation, we need to calculate the mean (μ) and standard deviation (σ) of the binomial distribution:

μ = n * p = 100 * 1/6 = 16.67

σ = √(n*p*(1 - p)) = √(100 * 1/6 * 5/6) = 4.08

Now, we can standardize the values 15 and 20 using the normal distribution:

z1 = (15 - μ) / σ = (15 - 16.67) / 4.08 ≈ -0.41

z2 = (20 - μ) / σ = (20 - 16.67) / 4.08 ≈ 0.81

Using a standard normal distribution table or a calculator, we can find the cumulative probabilities for these z-values:

P(15 ≤ X ≤ 20) ≈ P(-0.41 ≤ Z ≤ 0.81)

From the table or calculator, we find that P(-0.41 ≤ Z ≤ 0.81) is approximately 0.3106.

Therefore, the probability that the face showing a six turns up between 15 and 20 times when rolling the die 100 times is approximately 0.3106.

To cumulate the probability that the sum of the face values of the 100 trials is less than 300, we need to consider the distribution of the sum of independent rolls of a six-sided die.

The sum of the face values of the 100 trials will follow an approximately normal distribution due to the Central Limit Theorem.

The mean (μ) of the sum is 100 * (1+2+3+4+5+6)/6 = 350.

The standard deviation (σ) of the sum is:

√(100 * (1^2 + 2^2 + 3^2 + 4^2 + 5^2 + 6^2)/6) ≈ 50.99.

Now, we can standardize the value 300 using the normal distribution:

z = (300 - μ) / σ = (300 - 350) / 50.99 ≈ -0.98.

Using a standard normal distribution table or calculator, we can find the cumulative probability for this z-value:

P(X < 300) ≈ P(Z < -0.98) ≈ 0.1635.

Hence, the probability that the sum of the face values of the 100 trials is less than 300 ≈ 0.1635.

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The gallons of gas that Aubrey would need to travel 111.54 miles is 7.8 gallons.

In Mathematics, a direct proportion simply refers to a mathematical equation which is typically used to represent the equality of two (2) ratios.

By applying direct proportion to the given information, we have the following mathematical equation:

15 gallons of gasoline = 214.5 miles

X gallons of gasoline = 111.54 miles

By cross-multiplying, we have the following:

214.5x = 15 × 111.54

x = 1,673.1/214.5

x = 7.8 gallons of gasoline.

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Answer:

C

Step-by-step explanation:

- 4(x - 2) + 5 < 9 ← distribute parenthesis and simplify left side

- 4x + 8 + 5 < 9

- 4x + 13 < 9 ( subtract 13 from both sides )

- 4x < - 4

divide both sides by - 4, reversing the symbol as a result of dividing by a negative quantity.

x > 1

Answer: 5/12

Step-by-step explanation:

2/3 - 1/4 = 5/12

Answer:

1.75

Step-by-step explanation:

Answer:

3/2

Step-by-step explanation:

(64/729)^(−1/6)=(2^6/3^6)^(-1/6)=(2/3)^-1=3/2

Answer:

I think the answer is P(x>178)

Step-by-step explanation:

Answer: 0.16

Step-by-step explanation: Quizzed

The given statement " All else being equal, the further the t statistic falls from 0, either in the positive or negative direction, the more likely it is that the difference between two population averages is statistically significant. " is true.

The term t statistics refers the ratio of the departure of the estimated value of a parameter from its hypothesized value to its standard error.

Here we have the statement All else being equal, the further the t statistic falls from 0, either in the positive or negative direction, the more likely it is that the difference between two population averages is statistically significant.

And we need to identify whether the statement is true or not.

As per the definition of t statistics, we have identified that the t statistic falls from 0. which states that is goes on the negative direction.

Therefore, the more likely it is that the difference between two population averages is statistically significant.

So, the statement is correct.

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Memorizing algebra rules can be challenging, but a few strategies may help: Practice, Mnemonics, Repeat, and Use flashcards.

It's important to note that memorizing rules is not the best approach to understanding the concepts, the best approach is to understand the concepts, and the rules will come naturally.

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Answer:

Number of Nickels is 12

Number of Dimes is 9

Number of Quarters is 15

Step-by-step explanation:

Given that there are a total of 36 coins, which consists of nickels, dimes, and quarters.

That is, when we sum the numbers of nickels, dimes, and quarters, we have 36.

Let number of nickels be N

Let number of dimes be D

Let number of quarters be Q

Then

N + D + Q = 36 .................................(1)

- There are three fewer quarters than nickels.

This implies that

N = Q - 3 ..............................................(2)

Or

Q = N + 3 .............................................(3)

- There are six more dimes than quarters.

This implies that

Q = D + 6 .............................................(4)

Comparing (3) with (4), we see that

N + 3 = D + 6

N - D = 6 - 3

N - D = 3 ................................................(5)

Using (3) in (1)

N + D + (N + 3) = 36

2N + D = 36 - 3

2N + D = 33 ..........................................(6)

Solving (5) and (6) simultaneously

From (5): D = N - 3

From (6): D = 33 - 2N

=> N - 3 = 33 - 2N

N + 2N = 33 + 3

3N = 36

N = 36/3 = 12..........................................(7)

Using (7) in (6)

2(12) + D = 33

24 + D = 33

D = 33 - 24

D = 9 ........................................................(8)

Using (7) and (8) in (1)

12 + 9 + Q = 36

21 + Q = 36

Q = 36 - 21 = 15.......................................(9)

Therefore,

Number of Nickels, N = 12

Number of Dimes, D = 9

Number of Quarters, Q = 15

Based on the given information, we can estimate that out of the total population of students, 2 out of 4 students (or 50%) own graphing TI calculators so it can be estimated that the proportion of students who do not own a TI graphing calculator is 50%.

To estimate the proportion of students who do not own a TI graphing calculator, we can use the information provided that out of the 4 students who owned a TI calculator, 2 had graphing calculators. Since we know that all graphing calculators are TI calculators, we can assume that the 2 students with graphing calculators are included in the total count of students who own TI calculators. Therefore, the remaining 2 students who own TI calculators must have non-graphing calculators.

Based on this information, we can estimate that out of the total population of students, 2 out of 4 students (or 50%) own non-graphing TI calculators. Therefore, we can estimate that the proportion of students who do not own a TI graphing calculator is 50%.

It's important to note that this is an estimation based on the limited information provided. To obtain a more accurate estimate, a larger sample size or more comprehensive data would be needed. Additionally, this estimation assumes that the sample of 4 students is representative of the entire student population in terms of calculator ownership. If there are any biases or limitations in the sampling method or if the sample is not representative, the estimate may not accurately reflect the true proportion of students who do not own a TI graphing calculator.

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Answer:

C.

Step-by-step explanation:

I can explain in comments if needed, but c is the correct answer :)

Given equation g = x-1/k in terms of x would be x = 1 + gk

for given question,

we have been given an equation g = x-1/k

Dyani began solving the equation g = x-1/k for x by using the addition property of equality.

We solve given equation for x.

⇒ g = x-1/k                      ..........(Given)

⇒ gk = (x - 1/k)k               .........(Multiply both the sides by k)

⇒ gk = x - 1

⇒ gk + 1 = x - 1 + 1           .........(Add 1 to each side)

⇒ gk + 1 = x

⇒ x = 1 + gk

Therefore, given equation g = x-1/k in terms of x would be x = 1 + gk

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Answer:  Total Pay = 6X

Step-by-step explanation:  This assunes the question wants to know how to calculate Pablo's earning for a given tutoring time.

Pablo's rate is $6/hr.  Set X to the number of hours of tutoring.  Pablo's total pay would be:

Total Pay = 6X

(a) The distribution of X is binomial with parameters n = 20 and p = 600/3000 = 1/5 since we are randomly selecting 20 clients without replacement and interested in the proportion of happy consumers. Given below is the probability density function for this binomial distribution.

f(x) is equal to (n pick x) * p * x * (1-p) (n-x)

Where p and 1-p are the probability of success and failure, respectively, and n pick x is the binomial coefficient, which is equal to n!/(x! * (n-x)!).

(b) The formula for the anticipated value of X, or E[X], is

E[X] = np = 20 * (1/5) = 4

Var X, the variance of X, is defined as follows:

Var X = np(1-p) = 20*1/5*4/5=3.2

(c) The cumulative distribution function of the binomial distribution's formula can be used to get P[X >= 3]:

Sum(i=3 to n) f for P[X >= 3] (i)

Summarizing from I = 3 to 20 and substituting the values from the density function, we obtain:

Sum(i=3 to 20) = P[X >= 3] [(20 pick I (1/5)*i*4/5*(20-i)]

(d) We must determine the value of the cumulative distribution function at x = 3, which is equivalent to the likelihood of receiving three or fewer successes out of 20 trials, in order to approximate P[X >= 3] using the binomial table. By using n = 20 and p = 1/5 to calculate the value of the cumulative distribution function at x = 3 in the binomial table, it is possible to determine this probability. P[X >= 3]'s estimated value is 0.586.

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Answer:

y = -2 and x = 4

Step-by-step explanation:

8x + 14y = 4

-6x - 7y = -10

First, find the lowest common multiple of 8 and 6 (which is 24). Multiply the first equation by 3:

8x + 14y = 4

3(8x + 14y) = 3(4)

24x + 42y = 12

Multiply the second equation by 4:

-6x - 7y = -10

4(-6x - 7y) = 4(-10)

-24x - 28y = -40

Now, add the two equations together:

24x + 42y = 12

-24x - 28y = -40

24x + -24x = 0

42y + -28y = 14y

12 + -40 = -28

14y = -28

Divide both sides by 14:

14y ÷ 14 = -28 ÷ 14

y = -2

Plug this known variable back into the first equation:

8x + 14(-2) = 4

8x + (-28) = 4

8x - 28 = 4

Add 28 to both sides:

8x - 28 + 28 = 4 + 28

8x = 32

Divide both sides by 8:

8x ÷ 8 = 32 ÷ 8

x = 4

So y = -2 and x = 4.

Hope this helps!

Answer:

Step-by-step explanation:

The "trick" to this problem is knowing that opposite sides of the box add up to 180°

Now that you know that maybe you can solve this?

180= 7x+2 + 6x-4

180 = 13x -2

182 = 13x

14 = x

find y now to find all the angles

180 = 2y + 4 +4y - 4

180 = 6y

30 = y

now solve the x expressions and the y expressions

7x+2

7(14)+2

98 + 2

D= 100°

6x-4

6(14)-4

84-4

B = 80°

2y + 4

2(30) + 4

60 + 4

A = 64°

4y-4

4(30)-4

120-4

C = 116°

In order to conduct an experiment, subjects are randomly selected from a group of subjects. The question asks how many different groups of subjects are possible.

To answer this question, we need to consider the concept of combinations. In this case, we are selecting a group of subjects from a larger group without considering the order in which they are selected.

The number of different groups of subjects possible can be calculated using the combination formula, which is given by:

nCr = n! / (r!(n-r)!)

Where n represents the total number of subjects and r represents the number of subjects being selected for each group.

Since the question does not specify the values of n and r, we cannot provide an exact answer. However, in general, the number of different groups of subjects possible will depend on the total number of subjects and the number of subjects being selected.

In conclusion, the number of different groups of subjects possible can be determined using the combination formula, but the exact answer depends on the specific values of n and r.

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Answer: 8. Tens:4 Hundreds:5 Thousands:7

9. Tens:9 Hundreds:9 Thousands:9

10.Tenths:6 Hundredths:2 Thousandths:4

11. Tenths:7 Hundredths:3 Thousandths:6

Step-by-step explanation:

The example that shows how changes in supply and demand is "where an employer has increased sales and needs to hire another person during lunch hour which increases income." Correct option is A.

In this case, the increased sales represent an increase in demand for the employer's product or service, which creates the need for additional labor.

As a result, the employer hires another person, which increases the number of workers and, subsequently, the supply of labor. However, since the demand for the product or service has increased, the price for labor also goes up, which leads to an increase in the income of the person who was hired.

This is an example of how the interaction between supply and demand can affect the price and quantity of goods and services, as well as the wages and salaries of workers.

Correct option is A.

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Answer:

Wait,

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

12x12

11x11

10x10

9x9

8x8

7x7

6x6

5x5

4x4

3x3

2x2

1x1

add em together equal 650

Answer:

4p

Step-by-step explanation:

You have 3p + 2p - p

If there is a single alone p like on the end of the equation, it can be assumed that there is a 1 in front of it, even if it doesn't show it.

A letter variable that is alone means there's always like an invisible 1 in front. So, you have:

3p + 2p - 1p

Subtract 1p from 2p to get 1p, or just p.

3p + p

=4p

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The final expression after simplifying is 4p.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example:

2 + 3x + 4y = 7 is an expression.

3X + 4 - 5 is an expression.

We have,

3p + 2p - p

Add like terms.

3p + p

4p

Thus,

The final expression after simplifying is 4p.

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Step-by-step explanation:

the unit rate of y per x :

9/3 = 18/6 = 27/9 = 36/12

all the results = 3

the right answer is B) 3