i don’t understand this question

Answer:

17

Step-by-step explanation:

Answer:

17

Step-by-step explanation:

12/1/2 - (-4/1/2) becomes 12 1/2 + 4 1/2 after simplification.  Note that 12/1/2 is invalid.

Combining 12 1/2 and 4 1/2 yields 17.

Answer:

Diameter is equal to twice the radius. Given, radius is 4 cm. Diameter = 2(4) = 8 cm. Hence, diameter of the circle with radius as 4 cm is 8 cm.

Step-by-step explanation:

please

give brianliest

Answer: Area = 0

Step-by-step explanation:

((2*2)*3.14)-(4*3.14) = 0

Given:

The values of the US dollar (x) and a foreign currency (y) vary directly according to the formula:

\(y=2.5x\)

To find:

The number of units of the foreign currency would someone receive in exchange for 150 US dollars.

Solution:

We have,

\(y=2.5x\)

Substitute x=150 in the given formula.

\(y=2.5(150)\)

\(y=375\)

Therefore, 375 units of the foreign currency would someone receive in exchange for 150 US dollars.

The number of two pt problems are 30 and 5 pt problems are 8.

Two or more expressions with an Equal sign is called as Equation.

Let x= one type of question

Let x-22= the other type of questions

100=2x+5(x-22) Distribute

100=2x+5x-110

100=7x-110

100+110=7x

210=7x

Divide both sides by 7

one type 30=x

second type 30-22=8

Hence the number of two pt problems are 30 and 5 pt problems are 8.

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The probability is 0.6962  for the given standard deviation.

What is standard deviation?

Standard Deviation is a measure that shows what quantity variation (such as unfold, dispersion, spread,) from the mean exists. the quality deviation indicates a “typical” deviation from the mean. it's a well-liked live of variability as a result of it returns to the first units of live of the info set.

Main body:

X - Binomial(n = 130, p = 0.5)

Binomial can be approximated to normal with: μ = np = 130*0.5 = 65

σ = √np(1 − p) - = √130* (0.5)(1 − 0.5)

σ = 5.7

P(55 ≤ X ≤ 69 )

Since we are approximating a discrete binomial distribution by continuous normal distribution, values between 54.5 and 68.5 both approximate to 55. Thus, "between 55 and 69" corresponds to continuous normal distribution with P(54.5 < X 68.5) after continuity correction.

Normal Distribution, x₁ = 54.5, x2 = 68.5, µ = 65, σ = 5.7

We convert this to standard normal using z =

z₁ = 54.5-65/ 5.7 ≈ - 1.84

z₂ = 68.5-65/ 5.7  ≈ 0.614

P(54.5 < X < 68.5) = P(- 1.84 < Z < 0.614)

= P(Z < 0.614) − P(Z <- 1.84)

= 0.7291 - 0.0329   (from z-table)

= 0.6962

Hence the probability is 0.6962

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Yes, there is sufficient evidence at the 0.05 level to support the company's claim that less than 34% of computer chips fail in the first 1000 hours of their use.

To determine if there is sufficient evidence to support the claim, we can perform a hypothesis test. Let's set up the null and alternative hypotheses:

Null hypothesis (H0): The proportion of chips that fail in the first 1000 hours is equal to or greater than 34%.

Alternative hypothesis (Ha): The proportion of chips that fail in the first 1000 hours is less than 34%.

We can use the sample data to calculate the test statistic and compare it to the critical value at the 0.05 significance level.

Given that the sample of 1200 computer chips revealed that 31% of the chips failed, we can calculate the test statistic using the formula for the z-score:

z = (p - P) / √(P(1-P) / n)

Where p is the sample proportion, P is the hypothesized proportion, and n is the sample size.

In this case, p = 0.31, P = 0.34, and n = 1200. Plugging in these values, we can calculate the test statistic.

After calculating the test statistic, we compare it to the critical value from the standard normal distribution. At the 0.05 significance level, the critical value for a one-tailed test is approximately -1.645.

If the test statistic falls below the critical value, we reject the null hypothesis and conclude that there is sufficient evidence to support the company's claim. Otherwise, if the test statistic is greater than the critical value, we fail to reject the null hypothesis.

Performing the calculations, we find that the test statistic is approximately -5.76, which is much lower than the critical value of -1.645. Therefore, we reject the null hypothesis and conclude that there is sufficient evidence to support the company's claim that less than 34% of computer chips fail in the first 1000 hours of their use.

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Answer:

ummmmm i think apple?

Step-by-step explanation:

because if 4 equals green and you put the square root of branch in there you will get branch×apple tree+water=apple my bad its green apple

i did it wrong i just redid the question and found the right answer. so if you put branch×square root of 9 apples+apple tree=9 apples right? well yes but if you add branch+square root of 4 more apples you will get in total 13 apples.

If the price of good x increases, the demand curve for good Y to shift to the right.

Complement goods are defined as the goods that a consumer likes to consume with a given good. Example of goods like it , peanut butter and jelly.

Substitute goods are those goods that a consumer could consume instead of a given good. For example, peanut butter and almond butter. The Market Equilibrium is used to define the intersection between the demand and supply curve. In other words, the market equilibrium occurs when price and quantity are same.o

When the price of a substitute , x increases, the demand for the second good increases. That is to say, there is a positive relationship between these two variables. In other words the price of good x increased , the demand for x will increase because it is more attractive for consumers. Therefore, the demand curve of y all shifts to the right.

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Answer:

It seems that you are correct :)

Step-by-step explanation:

Answer:

3(7a + 3)

Step-by-step explanation:

3 is the greatest common factor between 21 and 9

put 3 outside the parenthesis and divide both numbers by 3

3(7a + 3)

Answer:

3(7a+3)

Step-by-step explanation:

Find the common factor

3 multiplied by 7 equals 21, and 3 times 3 equals 9

Take the common factor out of the parenthesis

3( _a+_)

and put in 7 and 3 in the appropriate spots

3(7a+3)

double check

3 times 7 is 21, 3 times 3 is 9

3(7a+3)= 21a+9

The statement is true. Simple random sampling is a method of selecting a sample from a larger population in which every member of the population has an equal chance of being selected for the sample.

This method is associated with a high degree of generalizability because it ensures that the sample is representative of the population. When a sample is representative of the population, the findings from the sample can be generalized to the entire population with a high level of confidence.

Simple random sampling is considered to be one of the most reliable and unbiased methods of sampling, making it a popular choice in many research studies.

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Answer:

12

Step-by-step explanation:

I. Find LCD value by devide all denominator,

 in this case are 3 and 4

        =   2 | 3 4

                | 3 2

        = 2 * 3 * 2

       = 12

Hope that help :)

Answer:

D

Step-by-step explanation:

3:

12

4:

16

Therefore 13 is in between 12 and 16

In a multiple regression problem involving two independent variables, if b1 is computed to be 2.0, it means that B. the estimated mean of y increases by 2 units for each increase of 1 unit of x1, holding x2 constant

Multiple regression is a statistical technique for examining the relationship between a single dependent variable and a number of independent variables. The goal of multiple regression analysis is to use known independent variables to predict the value of a single dependent variable.

Multiple regression predicts the value of one dependent variable by taking into account the values of the available multiple independent variables. For example, suppose a researcher decides to study the performance of students at a school over time.

In this case, the correct option is B.

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The estimated number of bacteria present in the culture after 5 hours as per exponential growth is equal to 5,240.

Initial population size (N₀) = 500 bacteria

Population size after 1 hour (N) = 800 bacteria

let us consider,

N₀ is the initial population size,

N is the population size at a given time,

k is the growth rate constant,

t is the time in hours,

e is the base of the natural logarithm (approximately 2.71828).

To determine the number of bacteria present in the culture after 5 hours,

Use the exponential growth formula for uninhibited growth,

N = N₀ × \(e^{(kt)\)

To find the growth rate constant (k), rearrange the formula as follows,

⇒k = ln(N / N₀) / t

⇒k = ln(800 / 500) / 1

⇒k = ln(1.6)

Using a calculator, we find that k ≈ 0.470

Now, use the growth formula to calculate the population size after 5 hours,

N = N₀ × \(e^{(kt)\)

N = 500 ×\(e^{(0.470 \times 5)\)

N = 500 × \(e^{2.35\)

Using a calculator, we find that \(e^{2.35\) ≈ 10.48

⇒N ≈ 500 × 10.48

⇒N ≈ 5240

Therefore, it is estimated that there will be approximately 5,240 bacteria present in the culture after 5 hours using exponential growth .

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The vaule of p(3) is equal to 20.5.

To find p(3), we need to substitute 3 in place of x in the given expression for p(x):
p(3) = 1/2(3-5)^2 + 14 First, we need to evaluate the expression inside the parentheses:
3-5 = -2
(-2)^2 = 4
So, we can simplify the expression as follows:
p(3) = 1/2(4) + 14
p(3) = 2 + 14
p(3) = 16

Replace 'x' with '3' in the function.
p(3) = \frac{1}{2}(3-5)^2+14. Evaluate the expression inside the parentheses.
(3-5) = -2. Square the result from Step 2.
(-2)^2 = 4. Multiply the result by \frac{1}{2}.
\frac{1}{2}(4) = 2. Add 14 to the result from Step 4.
2 + 14 = 16

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52 tiles are there in the 25th figure in this pattern.

A pattern is described as a series of recurring symbols, figures, or numbers. Any form of event or object can be related to a pattern.

A pattern has a rule that specifies which items fall within the pattern's umbrella and which do not.

A pattern in mathematics is a recurring arrangement of numbers, forms, colors, and other elements.

Any kind of event or object can be connected to the Pattern.

A pattern is referred to as a rule or a way in which a group of numbers is related to one another.

Sometimes a pattern is also referred to as a sequence.

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Answer:

Its C, the answer with the link is a virus so don't click that !

Step-by-step explanation:

The statement that could be true for h for given function is Option C  h(2) = 16 is correct.

The set of all potential values for the independent variable (typically designated as x) for which the function is specified is known as the domain of a function. In other terms, it refers to the entire set of input values for which a function returns a result.

We can state that for any value of x between -3 and 11, the corresponding value of h(x) will be between 1 and 25 because the function h has a domain of -3 x 11 and a range of 1 h(x) 25.

Indicates that the function h is not fixed and that its values change depending on the value of x.

Now, evaluate your options:

Option A h(-3) = -1 - This statement is false because the range of h(x) is stated to be between 1 and 25, so h(-3) cannot be less than 1.

OptionB h(13) = 18 - This statement cannot be true because h(x) is specified to have a range between -3 and 11, so h(13) is not defined.

OptionC h(2) = 16 - The statement may be accurate given that the value of h(x) for any x between -3 and 11 could range from 1 to 25, and there is no evidence to the contrary.

OptionD h(8) = 21 - Since we know that h(8) = 19, this assertion is false.

Therefore, the statement that could be true for h is: h(2) = 16

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Final Answer: \(x = 3 + \sqrt{2}, 3 - \sqrt{2}\)

Steps/Reasons/Explanation:

Question: Solve by using the quadratic formula:  \(x^{2} - 6x + 7 = 0\).

Step 1: Use the Quadratic Formula.

\(x = \frac{6 + \sqrt[2]{2} }{2}, \frac{6 - \sqrt[2]{2} }{2}\)

Step 2: Simplify solutions.

\(x = 3 + \sqrt{2}, 3 - \sqrt{2}\)

~I hope I helped you :)~ The quadratic formulaic is attached in an image.

Answer:

Step-by-step explanation:

i want to know too:((

The equation for the second plan is y = 95x, therefore, option (d) is correct.

Two or more expressions with an equal sign are defined as an equation.

Given that, the second plan costs $95 for each ticket and free shipping.

The total cost, y, for x tickets are:

y = 95x.

Hence. the equation for the second plan is y = 95x, therefore, option (d) is correct.

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Answer:

Irrational Numbers

Step-by-step explanation:Irrational numbers never end and never end/repeat.

Answer:

Step-by-step explanation:

n - 66 = -35

n = 31

Answer:

31

Step-by-step explanation:

n-40-26= -35

n= -35+26+40

n= 31

So, approximately 59 fish in the school would be longer than 92 cm.

An equation is a mathematical statement that shows that two expressions are equal. It consists of two sides separated by an equal sign (=). The expressions on both sides of the equal sign can contain variables, constants, coefficients, and mathematical operations such as addition, subtraction, multiplication, division, exponentiation, logarithms, etc.

Here,

We can solve this problem using the normal distribution formula, which states:

z = (x - mu) / sigma

where z is the standard score, x is the raw score, mu is the mean, and sigma is the standard deviation.

To find the number of fish longer than 92 cm, we need to find the proportion of fish in the population with lengths greater than 92 cm. We can then multiply this proportion by the total number of fish in the school to get the number of fish longer than 92 cm.

First, we calculate the standard score for 92 cm:

z = (92 - 78) / 14

z = 1

Next, we look up the proportion of the standard normal distribution that corresponds to a z-score of 1. We can use a standard normal distribution table or calculator to find this value. The proportion of the distribution that is greater than z = 1 is approximately 0.1587.

Therefore, the proportion of fish in the population with lengths greater than 92 cm is 0.1587. To find the number of fish longer than 92 cm, we multiply this proportion by the total number of fish in the school:

370 * 0.1587 = 58.8

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Answer:

Step-by-step explanation:

Answer:

point form is (2,-1), equation form is x= 2, y=-1

Step-by-step explanation: