insaley easy 4th grade homework math question i will mark brainliest

it is important to note that the model has a relatively low $R^2$ value, which suggests that there may be other factors that are influencing the number of insect species encountered that are not captured by the linear relationship between year and species.

To find the model that best fits the data, we can begin by plotting the data points and looking for any patterns. However, since we have ten data points, it may be easier to use a regression model to find the best fit.

We can use a linear regression model of the form $y = mx + b$, where $y$ represents the number of insect species and $x$ represents the year. We can use a tool such as Excel or a calculator with regression capabilities to find the values of $m$ and $b$ that minimize the sum of the squared errors between the predicted values and the actual values.

Using Excel, we find that the regression equation is $y = 5.66x + 40.6$, with an $R^2$ value of 0.304. This indicates that the linear model explains about 30.4% of the variability in the data, which is a relatively low value.

To interpret the model, we can say that on average, the number of insect species encountered each year increases by 5.66.

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Answer:

13. -75

14. 65536

15. 2

16. 28

17. 6.5

18. 153

Step-by-step explanation:

13. 2x(-2)+3^2 x 2x(-2^2)+3^0

-4 - 9 x 2 x 2^2 + 1

-4 - 9 x 2^3 +1

-4 - 9 x 8 + 1

-4 - 72 +1

-75

14. 4 x 4^2 x (-2 x 4^2)^2

2^2 x 2^4 x (2 x 4^2)^2

2^2 x 2^4 x (2 x 2^4)^2

2^2 x 2^4 x (2^5)^2

2^2 x 2^4 x 2^10

2^16 = 65536

15. 18 x (-3^3) / 9 x (-3) - 2^4

18 x 3^3 / 9x 3 - 2^4

2 x 3^3 / 3 - 2^4

2 x 3^2 - 2^4

2 x 9 - 16

18 - 16

2

16. -2^-2 / -2^1 x -2^3/ -2^2 + 12 x (-3^5) / 4 x (-3^3)

2^-2 / 2^1 x 2^3/ 2^2 + 12 x 3^5 / 4 x 3^3

2^-2 / 2^1 x 2 + 12 x 3^5 / 4 x 3^3

1 / 2 x 2 + 12 x 3^5 / 4 x 3^3

1 / 2 x 2 + 3 x 3^5 / 3^3

1 / 2 x 2 + 3 x 3^2

1 + 3 x 3^2

1 + 3^3

1 + 27

28

17. -2^4 + -2^2 / -2^3 +(-2^4) x (-2^-2)

-2^4 -2^2 / -2^3 +(-2^4) x (-2^-2)

-2^4 -2^2 / -2^3 + 2^4 x 2^-2

-2^4 -2^2 / -2^3 +2^2

-2^2 x (2^2 + 1) / -2^3 +2^2

-2^2 x (2^2 + 1) / -2^3 + 4

4 + 1 / 2 + 4

5 / 2 + 4

13 / 2 = 6.5

18. (12 x 2^-1 / 4 x 2^-3)^2 - (-3^2)

(12 x 2^-1 / 4 x 2^-3)^2 + 3^2

(3 x 2^-1 / 2^-3)^2 + 3^2

(3 x 2^2)^2 + 3^2

(3 x 4)^2 + 9

12^2 + 9

144 + 9

153

The equation of a line is given by:

y = mx + c

where m is the slope of the line and c is the y-intercept.

The equation 2x + 2y = 16 in slope-intercept form is

y = -x + 8.

Where slope = -1 and y-intercept is 8

The equation of a line is given by:

y = mx + c

where m is the slope of the line and c is the y-intercept.

Example:

The slope of the line y = 2x + 3 is 2.

The slope of a line that passes through (1, 2) and (2, 3) is 1.

We have,

We have the equation as,

2x + 2y = 16

We need to convert in the form of y = mx + c.

Subtract 2x on both sides.

2y = -2x + 16

Divide both sides by 2.

y = (-2x + 16) / 2

y = -x + 8

This is in the form of slope-intercept form.

Where slope = -1 and y-intercept is 8

Thus,

The equation 2x + 2y = 16 in slope-intercept form is

y = -x + 8.

Where slope = -1 and y-intercept is 8

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Answer:

x= 17

Step-by-step explanation:

using Pythagoras' Theorem we have

\(8^2+15^2=x^2\\\\64+225=x^2\\\\289=x^2\\\\x^2=17^2\\\\x=17\)

Answer:

In a significance test, the statement we want to prove or test is called the alternative hypothesis.

Step-by-step explanation:

The alternative hypothesis, denoted as H1 or Ha, is a statement that contradicts or challenges the null hypothesis (H0). It represents the researcher's claim, expectation, or the hypothesis they are interested in supporting. The alternative hypothesis proposes that there is a significant relationship, effect, or difference between variables or conditions.

The null hypothesis, on the other hand, is the default assumption or statement of no effect or no difference. It assumes that any observed difference or relationship in the data is due to chance or random variation.In a significance test, statistical analysis is performed to evaluate the evidence against the null hypothesis and determine if there is sufficient evidence to support the alternative hypothesis. The analysis typically involves calculating a test statistic and comparing it to a critical value or p-value.

If the observed data provide strong evidence against the null hypothesis, the alternative hypothesis is supported, indicating that there is a statistically significant relationship, effect, or difference. If there is insufficient evidence to reject the null hypothesis, the alternative hypothesis is not supported.

It's important to note that in a significance test, the goal is to gather evidence to support the alternative hypothesis rather than proving it definitively. Statistical inference allows researchers to make conclusions based on the available evidence and quantify the level of confidence in their findings.

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The statements are characterized as converse, inverse, and contrapositive statements as follows:

Converse statements:

Inverse statements:

Contrapositive statements:

So, the given sentences are:

Therefore, the statements are characterized as converse, inverse, and contrapositive statements as follows:

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Answer:

1,2,4

Step-by-step explanation:

edem

The website gets, on average, 24 hits per hour.

To answer this question using a Poisson process, we first need to find the average rate of hits per hour. Given that the website gets 4 hits every 10 minutes, we can calculate the average hits per hour by multiplying the hits per 10 minutes by 6 (since there are six 10-minute intervals in an hour).

So, 4 hits/10 minutes * 6 = 24 hits per hour. The Poisson process allows us to model the number of hits as a random variable with an average rate of 24 hits per hour, making it suitable for predicting the number of hits in different time intervals.

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Answer:

4739 CDs

Step-by-step explanation:

Given the function that models the rate at which the disc is sold expressed as;

R(t)=20,000e^−0.12t

t is the number of weeks since the CD was first released

We are to look for the number of CDs that are expected to be sold during the first 12 weeks after the release. To do this, you will simply substitute t = 12 into the modeled function and get R(12) as shown;

R(t)=20,000e^−0.12t

R(12)=20,000e^−0.12(12)

R(12)=20,000e^−1.44

R(12)=20,000(0.2369)

R(12) = 4738.56

Hence the total number of CDs expected to be sold to nearest thousand is 4739 CDs

Answer:

127,000

Step-by-step explanation:

you take the integral from 0 to 12 of R(t)

===========================

Work Shown:

Plug in f(x) = 37. Solve for x. Use logarithms.

f(x) = 20(1.05)^x

37 = 20(1.05)^x

20(1.05)^x = 37

1.05^x = 37/20

1.05^x = 1.85

log( 1.05^x ) = log( 1.85 )

x*log( 1.05 ) = log( 1.85 )

x = log( 1.85 )/log( 1.05 )

x = 12.6088044498867

Round up to the nearest whole number to get x = 13.

In the year 2013, sales exceed 37 million.

Answer:11.2

Step-by-step explanation:

≈ 24 cm

Hi there !

c = 2πr  } => c = πd => d = c/π

2r = d

replace c ; π

π  =3.14

d = 74cm/3.14

= 23.5668

≈ 24 cm

Good luck !

Let's solve for x by factoring this quadratic equation.

We first need to determine which two numbers multiply to -28 (c) but add to 3 (b).

The two numbers that multiply to -28 and add to 3 are 7 and -4.

Therefore, we can factor this equation like so:

Now, we can set this equation to 0 and solve for x.

If we look at each factor individually, we can determine the values of x:

Subtract 7 from both sides of the equation.

Now, let's look at the other factor:

Add 3 to both sides of the equation.

The solution of x^2 + 3x - 28 is x = -7, x = 4.

Answer:

domain= infinity on both sides.  range= -3<y<infinity

Step-by-step explanation:

hope this helps

Have a nice day :)

Answer:

b=3v/h

Step-by-step explanation:

v=1/3bh

x3.  x3

3v=bh

/h.  /h

3v/h=b

Hopes this helps please mark brainliest

Answer:

3v/h

Step-by-step explanation:

v = 1/3bh

Multiply everything by 3 to get rid of the fractions. Just makes it look cleaner.

3v = bh

Then divide by h to isolate b on both sides.

3v/h = b

Viksim, this is the solution:

• Alex's base salary = $ 2,200

• Alex's commision = 10% of total vacuum cleaners or 0.1

• Total sales one month = $ 4,300

In consequence,

• Total salary = Base salary + Commission

• Total salary = 2,200 + (0.1 * 4,300)

• Total salary = 2,200 + 430

• Total salary = 2,630

Alex earned $ 2,630 of total salary

The answers that  best explains how we check to make sure that this condition is met is: c. Make sure there is similar spread around the sample mean of y.

The equal spread condition states that the residuals (differences between the actual and predicted values of y) should have roughly equal variance at each value of x.

To check if this condition is met, we examine the residual plot, which is a scatterplot of the residuals versus the independent variable x. If the spread of residuals around the mean is roughly equal for all x, then the equal spread condition is satisfied.

Therefore the correct option is C.

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Answer:

23 625

Step-by-step explanation:

\(42000 - 25\% = 31500 \\ 31500 - 25\% = 23625\)

Answer:

The value of the car in 2 years will be 21,000 I believe.

Step-by-step explanation:

The car originally costs 42,000 dollars. Every year the car loses 25% of it's original value.

The first thing to do is multiply .25 by 42,000. This should give you 10,500.

(42,000)(.25) = 10,500

Next is to multiply 10,500 by 2 to cover the second year. Your answer should be 21,000.

(10,500)(2) = 21,000

Now subtract that from the original value. And you should get 21,000.

42,000 - 21,000 = 21,000

Best of Luck!

If this is not the answer then it is, $23,625.

Answer:

hrheje

Step-by-step explanation:

bdhsjsiskskdkdhdhennsjss

Answer:

8\(x^{6}\) + 12\(x^{4}\)y² + 6x²\(y^{4}\) + \(y^{6}\)

Step-by-step explanation:

This can be expanded using the binomial theorem or by multiplying the factors.

In case you are not aware of the theorem, will do multiplication.

Given

(2x² + y²)³ = (2x² + y²)(2x²+ y²)(2x² + y²)

Expanding the second pair of factors

Each term in the second factor is multiplied by each term in the first factor, that is

2x²(2x² + y²) + y²(2x² + y²) ← distribute both parenthesis

= 4\(x^{4}\) + 2x²y² + 2x²y² + \(y^{4}\) ← collect like terms

= 4\(x^{4}\) + 4x²y² + \(y^{4}\)

Now multiply this by the remaining factor (2x² + y²)

(2x² + y²)(4\(x^{4}\) + 4x²y² + \(y^{4}\))

= 2x²(4\(x^{4}\) + 4x²y² + \(y^{4}\)) + y²(4\(x^{4}\) + 4x²y² + \(y^{4}\)) ← distribute both parenthesis

= 8\(x^{6}\)+ 8\(x^{4}\)y² + 2x²\(y^{4}\) + 4\(x^{4}\)y² + 4x²\(y^{4}\) + \(y^{6}\) ← collect like terms

= 8\(x^{6}\) + 12\(x^{4}\)y² + 6x²\(y^{4}\) + \(y^{6}\)

Answer:

0

Step-by-step explanation:

The first number is 40 and decreases by 4 in each factor, and the second number is -10 and increases by 1 in each factor.

The first number is positive and decreases by 10% its value in each factor, and the second number is negative and increases by 10% its absolute value in each factor. That means we will have a factor where both numbers are 0 (in the 11th value, we will have the first number 40 - 4*10 = 0 and the second number -10 + 1*10 = 0), so the factor will be 0 + 0 = 0, and then whole product will be zero.

There are 10 people running for the 7 seats in the school's student council. The number of different student council combinations is 120.

To calculate the number of different student council combinations, we can use the concept of combinations, specifically the formula for selecting r objects from a set of n objects without replacement. In this case, we have 10 people running for 7 seats, which means we need to select 7 people from the group of 10.

The formula for combinations is given by:

C(n, r) = n! / (r!(n - r)!)

Plugging in the values, we have:

C(10, 7) = 10! / (7!(10 - 7)!)

= 10! / (7!3!)

Using factorials, we can simplify this calculation:

10! = 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 3,628,800

7! = 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5,040

3! = 3 x 2 x 1 = 6

Substituting these values back into the formula:

C(10, 7) = 3,628,800 / (5,040 x 6) = 120

There are 120 different student council combinations possible when 10 people are running for the 7 available seats. This means that out of the 10 candidates, any group of 7 can be chosen to form the student council in a total of 120 different ways.

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72, 2-ounce servings can be made to serve with buffalo wings.

Given that 6 bunches of celery each weighs 2 pounds. We have to find out how many 2-ounce servings can be made to serve with buffalo wings. Also, celery has a 75% yield.

\(Total weight of celery = 6 bunches * 2 pounds\)

each = 12 pounds

Total weight of celery in ounces

  \(= 12 pounds * 16 ounces\)

\(= 192 ounces\)

75% yield of celery means that 75% of the celery is edible.

The edible portion of celery

    = 75% of 192 ounces  

   \(= (75/100)*192 = 144 ounces\)

Now, as we have to find the number of 2-ounce servings that can be made, we need to divide the edible portion of celery by 2 ounces each. Thus, the number of 2-ounce servings can be made to serve with buffalo wings

  \(= 144/2 = 72.\)

Hence, 72 2-ounce servings can be made to serve with buffalo wings.

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To answer this question, we need to calculate the mean, standard deviation and coefficient of correlation between price, age, and mileage of the used sedans.

A) The mean price of the sedans is $7,804.15, the mean age is 9.25 years, and the mean mileage is 118,420 miles.

B) The standard deviation for price is $2,395.84, the standard deviation for age is 3.83 years, and the standard deviation for mileage is 23,799.43 miles.

C-1) The coefficient of correlation between price and age is -0.5695.

C-2) This means that there is a negative linear relationship between the price of a car and its age.

D-1) The coefficient of correlation between price and mileage is -0.3564.

D-2) This means that there is a negative linear relationship between the price of a car and its mileage.

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To verify the inequality without evaluating the integrals, we can use the properties of integrals.

First, we know that the integral of a positive function gives the area under the curve. Therefore, the integral of √(1-x^2) from -1 to 1 gives the area of a semicircle with radius 1. This area is equal to π/2, which is approximately 1.57.
Next, we can use the fact that the integral of a function over an interval is less than or equal to the product of the length of the interval and the maximum value of the function on that interval. Since the function √(1-x^2) is decreasing on the interval [-1,1], its maximum value is at x=-1, which is √2/2.
Using this property, we have:
∫1 -1 √(1-x^2) dx ≤ (1-(-1)) * √2/2 = √2
Finally, we can use a similar argument to show that the integral is greater than or equal to 2. Therefore, we have:
2 ≤ ∫1 -1 √(1-x^2) dx ≤ √2
To verify the inequality 2 ≤ ∫(1, -1) √(1 - x^2) dx ≤ 2√2 using properties of integrals, let's first establish that the integrand is non-negative on the interval [-1, 1]. Since 0 ≤ x^2 ≤ 1, we have 0 ≤ 1 - x^2 ≤ 1, so √(1 - x^2) is non-negative.
Now, consider the areas of two squares: one with side length 2 and the other with side length √2. The area of the first square is 2² = 4, and the area of the second square is (√2)² = 2. Since the integrand lies between 0 and 1, the area under the curve is less than the area of the first square but more than half of it (as it resembles half of the first square).
Therefore, 2 ≤ ∫(1, -1) √(1 - x^2) dx ≤ 2√2, as the area under the curve is between half of the first square's area and the second square's area.

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Answer:

"70, because 528 divides by 264 is 2, which means each picture is 2 megabytes, so therefore 35x2 = 70"

Step-by-step explanation:

Answer:

i think its 9 1/4

Step-by-step explanation:

The equation of the line of the other leg of the right triangle if it shares the vertice of (10,0) is y = -1/3x + 10/3

The equation of a line in slope-intercept form is expressed as y = mx + b

where

m is the slope

b is the y-intercept

Given the coordinate points (-2, 4) and (10, 0)

Find the slope

Slope = -4/12
Slope = -1/3

Determine the y-intecept

0 = -1/3(10) + b

b = 10/3

Determine the equation

y = -1/3x + 10/3

Hence the equation of the line of the other leg of the right triangle if it shares the vertice of (10,0) is y = -1/3x + 10/3

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What are the answer choices please?