Please help me with this linear inequalities as graphs question!
I'd really appreciate if you added workings out and explained it a bit, as I'm terribly stuck.

Answer:

Please check attachment

Step-by-step explanation:

Here, we want to plot the graph of y = 6-2x on the grid

We can rewrite this to look like the general form as;

y = -2x + 6

The y-intercept is 6

This point is (0,6)

For the x-intercept, equate y to 0

0 = -2x + 6

2x = 6

x = 6/2

x = 3

The x-intercept is (3,0)

So we have to join the point (3,0) with (0,6)

Please check the attachment for the plot of this on the grid

The equation of exponential regression that fits the data is given as follows:

y = 1.5(2.5)^x.

An exponential function has the definition presented as follows:

y = ab^x.

In which the parameters are given as follows:

To obtain the equation of exponential regression, we must insert the points of the data-set into a calculator.

The points are given as follows:

(1, 3.75), (4, 9.375), (3, 23.438), (4, 58.594), (5, 146.484).

Inserting these points into a calculator, the equation is given as follows:

y = 1.5(2.5)^x.

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Answer:

Step-by-step explanation:

cheetah runs 60 miles/hour

lion runs 50 miles/hour

answer A

Answer:

A. the cheetah is faster by 10 miles

Step-by-step explanation:

If you add the other half hour a lion can run (25 miles) 25+25=50, 60 is greater than 50 by 10.

Answer:

x = 5/3 , y = -1

Step-by-step explanation:

Given:

\(\begin{bmatrix}3x+y=4\\ 6x+4y=6\end{bmatrix}\)

Solve:

\(\mathrm{Substitute\:}x=\frac{4-y}{3}\)

\(\begin{bmatrix}6\cdot \frac{4-y}{3}+4y=6\end{bmatrix}\)

\(\mathrm{Simplify}\)

\(\begin{bmatrix}2y+8=6\end{bmatrix}\)

\(\mathrm{For\:}x=\frac{4-y}{3}\)

\(\mathrm{Substitute\:}y=-1\)

\(x=\frac{4-\left(-1\right)}{3}\)

\(\mathrm{Simplify}\)

\(x=\frac{5}{3}\)

\(\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}\)

\(x=\frac{5}{3},\:y=-1\)

3(5/3) + -1

5-1 = 4

True

6(5/3) + 4(-1)

10 -4 = 6

True

~lenvy~

Answer:

In this particular type of question we need to understand that perfect squares are the squares of the integers numbers and perfect square always end in 0,1,4,5,6,9.A perfect square number never ends with 2,3,7 or 8 .This is the first observation you will make to check if the number is a perfect square or not.

Step-by-step explanation:

The required sample size is 907.

We have,

To determine the required sample size for estimating the fraction of new car buyers who prefer foreign cars over domestic with a 95% confidence level and an error of at most 0.03, we'll use the following formula:
n = (Z² x p  (1 - p)) / E²
Where:
- n is the required sample size
- Z is the Z-score for the desired confidence level (1.96 for a 95% confidence level)
- p is the estimated population proportion (0.31)
- E is the margin of error (0.03)

Step-by-step calculation:
1. Calculate Z²: 1.96² = 3.8416
2. Calculate p (1 - p): 0.31 x (1 - 0.31) = 0.2139
3. Calculate E²: 0.03² = 0.0009
4. Substitute these values into the formula: n = (3.8416 x 0.2139) / 0.0009 = 906.92

Since we need to round up to the next integer, the required sample size is 907.

Thus,

The required sample size is 907.

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A rule that we need to know in order to solve this is:

The extended rule would be:

Also, remember another rule:

Keeping all these rules in mind, we can simplify:

THis is the final form.

Answer:

1: 1/3

2: 3/19

3: 7/3

Step-by-step explanation:

Answer:

wooohohh what is that it's not a question lol i can't find the question to answer youu

Answer:

For the first picture, I think it is C and the second one should be A.

Step-by-step explanation:

You use vertical lines and if it hits it multiple times it is not a function. Like if it hits two dots or something it is not a function. I hope that make sense, let me know if it doesn't.

A $900 item on the sale of 20% discount the

Money off: $180

Amt. of tax: $50.40

Money paid: $770.40

Final price: $770.40

what is discount ?

A discount is a reduction in the price of an item or service, often offered as a promotion or incentive to encourage customers to make a purchase. The discount is usually expressed as a percentage of the original price and represents the amount of money that the customer can save on the purchase.

For example:

Percentage discount: a certain percentage of the original price is deducted from the selling price. For example, a 20% discount on a $100 item would reduce the price to $80.

According to the question:
To calculate the final price of the item with sales tax, we can follow these steps:

Calculate the amount of money off by multiplying the original price by the discount percentage:

Money off = 0.20 x $900 = $180.

Calculate the price after the discount by subtracting the money off from the original price:

Price after discount = $900 - $180 = $720.

Calculate the amount of sales tax by multiplying the price after discount by the tax rate:

Amount of tax = 0.07 x $720 = $50.40.

Calculate the money paid by adding the price after discount and the amount of tax:

Money paid = $720 + $50.40 = $770.40.

Therefore, the final price with 7% sales tax is $770.40.

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Answer:

i think it would be B because if AC= 80 and thats like the distane between then abc would be 80 if im thinking right

Step-by-step explanation:

but  hey if im wrong ill have my friend punch me in the arm to make it even

uh what function??

/////

a. Interest of the first year = $26.93

b. Balance after the first year = $1256.93

c. Interest for the second year = $27.52

d. Balance after the second year = $1284.45

Although a part of your question is missing, you might refer to this full question: Gerry deposited $1230 in an account that pays 2.19% simple interest for one year.

a. How much interest will he earn in one year?

b. What will be his balance after one year?

c. Gerry withdraws all of the principal and interest after the first year and deposits into another one-year account at the same rate. What will be his interest for the second year?

d. What will his balance be after two years?

Principal = $1230

Rate = 2.19%

Formula to be used:

Simple interest = (P*R*T)/100

where P = principal

R = rate

T = time in years

Calculating interest for the first year:

S.I = (1230*2.19*1)/100

S.I = 26.93

So, he will earn $26.93 as interest in the first year

And balance after the first year will be $1256.93

Solving for the second year:

P = 1256.93

S.I = (1256.93*2.19*1)/100

= 27.52

So, interest for the second year will be $27.52

And balance after the second year will be $1284.45

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The characteristic equation is given by \(r² - 2r - 3 = 0\) ⇒ \((r - 3)(r + 1) = 0\) ⇒ \(r = 3\) and \(r = -1\). The complementary function is \(yc = c₁e³x + c₂e⁻x\)  where c₁ and c₂ are constants.

To identify the particular integral, let's guess that it has the form:

\(yp = Axex\)

Since the function is already present in the complementary function and the differential equation is not homogeneous, let's guess the particular integral takes the form:

\(yp = A x²ex\)

Therefore,

\(yp' = (2Ax + A)ex\)

\(yp'' = (4A + 2A)ex\)

\(= 6Aex\)

Substituting these into the differential equation:

\(6Aex − 2(2Ax + A)ex − 3A x²ex = 4ex − 6\)

==> \(2Axex = 4ex\)

==> \(A = 2\)

Therefore, the particular integral is given by:

\(yp = 2 x²ex\)

The general result of the differential equation:

\(y = yc + yp\)

\(= c₁e³x + c₂e⁻x + 2 x²ex\)

Hence, the result of the differential equation is given by

\(yc = c₁e³x + c₂e⁻x\)

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Answer:

24cm^2

Step-by-step explanation:

Can I get brainliest plzzzzzz I need it

Answer:

4 children per counselor

Step-by-step explanation:

Since the question is asking children per counselor, divide the children/counselor. Check all of the rows by dividing the children by counselor to make sure the constant of proportionality is correct. If you divide correctly, the constant of proportionality you get is 4.

Hope it helps!

Answer:

there is 4 students per conceler.

Step-by-step explanation:

please mark as brainllist.

a. When evaluating a model, we use R2 as a parameter for performance assessment.

b. If model A has a higher MAPE but model B has a higher R2, we choose the model with the higher R2 for better overall performance.

c. For accuracy measures, we typically use MAPE (Mean Absolute Percentage Error) due to its interpretability and ability to capture relative errors.

When evaluating a model's performance, it is crucial to choose the appropriate parameters to assess its accuracy and reliability. In the case of MAPE (Mean Absolute Percentage Error) and R2 (Coefficient of Determination), the choice between them depends on the specific evaluation goals.

The R2 parameter is commonly used for evaluating models because it measures the proportion of the dependent variable's variance that can be explained by the independent variables. R2 provides insights into how well the model fits the data and captures the relationship between the input features and the target variable. Therefore, R2 is a suitable parameter to use when evaluating a model.

When comparing two models, if model A has a higher MAPE but model B has a higher R2, it is advisable to choose the model with the higher R2 value. This is because R2 indicates the proportion of variance explained, suggesting that model B performs better in capturing the underlying patterns and predicting the target variable.

Although model A may have a lower relative error (MAPE), it is crucial to prioritize the model's ability to explain and predict the target variable accurately.

Among MAPE, MAD (Mean Absolute Deviation), and MSD (Mean Squared Deviation), MAPE is commonly preferred as a parameter for accuracy measures. MAPE calculates the average percentage difference between the predicted and actual values, making it interpretable and easily understandable.

It captures relative errors and enables comparisons across different scales and datasets. MAD and MSD, on the other hand, measure absolute and squared errors, respectively, but they do not account for the relative magnitude of the errors. Hence, MAPE is a more suitable parameter for accuracy measures.

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Answer:

273/4

Step-by-step explanation:

We know

A company’s stock opened at 68 3/8 dollars per share

68 3/8 = 547/8

The stock dropped 1 7/8 dollars on Monday

1 7/8 = 15/8

547/8 - 15/8 = 532/8

The stock dropped another 2 1/2 dollars on Tuesday.

2 1/2 = 5/2

532/8 - 5/2 = 532/8 - 20/8 = 512/8

On Wednesday, the stock gained back 4 1/4 dollars.

4 1/4 = 17/4

512/8 + 17/4 = 512/8 + 34/8 = 546/8

546/8 = 273/4

So, the answer is 273/4

The appropriate statistical test for a correlated groups experiment where the population standard deviation needs to be estimated to determine the significance of the sample results is the paired t-test.

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Answer:

B. 6 inches

Step-by-step explanation:

To find how wide it is, multiply the length by 3/4

8(3/4)

= 6

The width of the rectangle in 6 inches.

So, the correct answer is B. 6 inches

Answer:

B. \(a_{n} = a_{n-1}+2\); \(a_{1} = 2\)

Step-by-step explanation:

According to the statement, we find that the following two conditions must be observed:

\(a_{i} = 86\) (Eq. 1)

\(a_{i}-a_{i-1} = 2\) (Eq. 2)

Since the difference between two even numbers leads to another even number. Hence, \(a_{1}\) must be an even number and the correct answer is B.

Clare and her two best friends use 4 yards of cloth for making 3 capes.

Given,

The length of cloth for making one cape = 4 feet

Number of capes needed = 3 ( for Clare and her two best friends)

We have to find the length of cloth in yards needed to make the 3 capes.

Here,

1 yard = 3 feet

Total length of cloth needed = length for one cape x number of capes

= 4 x 3

= 12 feet

Here,

3 feet = 1 yard

Then,

12 feet = 12/3 = 4 yards

That is,

Clare and her two best friends use 4 yards of cloth for making 3 capes.

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Answer:

A and 1/3

Step-by-step explanation:

Answer:

x = 6

Step-by-step explanation:

For the triangles to be similar then the ratios of corresponding sides would be equal, that is

\(\frac{DF}{XZ}\) = \(\frac{DE}{XY}\) , substitute values

\(\frac{3(x-1)}{7.5}\) = \(\frac{10}{x-1}\) ( cross- multiply )

3(x - 1)² = 75 ( divide both sides by 3 )

(x - 1)² = 25 ( take the square root of both sides )

x - 1 = ± \(\sqrt{25}\) = ± 5 ( add 1 to both sides )

x = 1 ± 5 , then

x = 1 + 5 = 6 or x = 1 - 5 = - 4

But x > 0 then x = 6

For the triangle to be similar then x = 6

Answer:

missing length= 2.8

Step-by-step explanation:

a^2+b^2=c^2

a^2+1^2=3^2

a^2=3^2-1^2

a^2=8

a=2.8284271247461

a=2.8

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-2 - 10h = -11h - 20

+ 2

- 10h = -11h - 18

+ 11h

h = -18

Have A Nice Day ❤    

Stay Brainly! ヅ    

- Ally ✧    

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Step-by-step explanation:

-2-10h=-11-20, take -10 to the other side.

-2= -1-20, take 20 to the other side.

-18=-1h

-ve and -ve is pos.

h=18

positive 18

If Yuvia also earns a base salary of $45 per day. The total amount she earned that day will be $245.

It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.

The usage of percentages is widespread and diverse. For instance, numerous data in the media, bank interest rates, retail discounts, and inflation rates are all reported as percentages. For comprehending the financial elements of daily life, percentages are crucial.

It is given that, Yuva works in a computer store, where she earns a commission of 8 percent of her sales. On Monday, her sales were $2,500.

Commission = 8 % of sales

Commission =($2,500)(0. 08)

Commission =$ 200

If yuvia also earns a base salary of $45 per day,

Total salary = base pay + commission].

Total salary =45 +200

Total salary =$245

f Yuvia also earns a base salary of $45 per day. The total amount she earned that day will be $245.

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