please answer asap, i'll give brainliest
Which coordinate grid shows the correct locations of P(1.5, 1), point Q, which is a reflection of point P across the y-axis, and R(2.5, −1)?

Answer:

Calculating from a Regular Hexagon with a Given Apothem. Write down the formula for finding the area of a hexagon with a given apothem. The formula is simply Area = 1/2 x perimeter x apothem.

Step-by-step explanation:

Answer its quite easy i hope this will be right

1) 4.1833

2) 5.29+2.366=7.656

Answer:

Step-by-step explanation:

The total number of defective iphones from a batch of 16,530 iphones is equal to 513 .

Total  number of iphones examined by quality-control inspector =290

Total number of iphones in a batch = 16,530

Number of iphones defective out of 290 = 9

Let us consider x be the number of defective iPhones in the batch of 16,530 iPhones.

Use proportions to find out how many defective iPhones there will be in a batch of 16,530 iPhones.

The proportion of defective iPhones in the sample of 290 iPhones is,

= 9/290

Proportion of defective iPhones in a batch of 16,530 iPhones,

Set up a proportion,

9/290 = x/16530

To solve for x, we can cross-multiply,

⇒ 9 x 16530 = 290 x

⇒ 148,770 = 290 x

⇒ x = 513

Therefore, there will be approximately 513 defective iPhones in a batch of 16,530 iPhones.

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Answer:

9

Step-by-step explanation:

25 times .36 is 9!

I hope this helps!

Answer:

36% x 25= 9

9 students ate hotdogs

Step-by-step explanation:

just find out how many students are 36% of the class, all i did was take the precent of the class and multiplied it by the number of students in the class in this case 25

Answer: the sales tax is 2.45

Step-by-step explanation:

the sales tax are 35 * 7/100=2.45

Answer:

Step-by-step explanation:

12$ = original price (need to add 67% mark up)

12/100 = 0.12 = 1%

0.12 x 67 = $8.04 markup

12 + 8.04 = $20.04 is the correct selling price

the error was accidently not adding the markup ($8.04) to the original price

ANSWER

The wind velocity is 43.2 miles

EXPLANATION

Given information

The total distance covered by the plane when flying with a tailwind is 550 miles

The total time = 2 hours

Let w represents the velocity of the wind

The speed with the wind = (160 + w)

The speed against the wind = (160 - w)

To find the wind velocity, follow the steps below

Step 1: Write the formula for writing distance

Step 2: Find the time for the plane to travel with the wind

Step 3: Find the time for the plane to travel against the wind

Recall, that the total time is time against - time with

Step 4:Substiute the value got in steps 2 and 3 into the formula in step 4

Step 5: Simplify the above expression

Step 6: Simplify the quadratic function using the general formula

Hence, the wind velocity is 43.2 miles

Answer:

x=-23

Step-by-step explanation:

-0.48x+0.28=4.6

-0.2x=4.6

x=-23

Answer:

it’s -0.2x =4.6

Step-by-step explanation:

X = -23 is the answer for the equation but

your asking for what the number is before the x right

it’s -0.2x =4.6

than multiple both sides by 10

divide both sides by -2

simplify

X=-23

(5.8f - 3g + g) - (7f - 2.5g)

(5.8f - 4g) - (7f - 2.5g)

2.8f - 2.5g

Answer:

2.8f - 2.5g

The complete factorization of the quadratic equation 6x² + 15x - 36 is given by:

How to factor a quadratic equation?

A quadratic equation is modeled by:

Considering the roots and , it can be factored as:

In this problem, the function is:

Hence the coefficients are , and:

Hence:

Answer:

Step-by-step explanation:

Answer:

To factor the expression 6x² + 15x - 36 = 0, we can use the technique of factoring by grouping.

First we will write the expression as two binomials:

6x² + 15x - 36 = (6x² + 18x) - (3x + 36) = 0

Next we will factor out the greatest common factor (GCF) of the first binomial:

6x² + 18x = 3x(2x + 6)

Next we will factor out the GCF of the second binomial:

3x + 36 = 3x(1 + 12)

Bring the factors out of the parentheses:

3x(2x + 6) - 3x(1 + 12) = 3x(2x-1+6-12) = 3x(2x-6) = 0

So the expression is factored completely as 3x(2x-6) = 0.

We can see that the factors of the expression 6x² + 15x - 36 = 0 are 3x and (2x-6)

Step-by-step explanation:

No. of points got from 1 stunt = 50.

No. of points deducted from 1 fail = 40.

6 stunts and 9 falls were gained last week.

So, A/C the number of points earned =

(6×50)-(9×40)

= 300 - 360

= -60

Her score today is 3 times her score from last week so multiply by 3

= (-60) × 3

= -180

If it were multiplied by -3 instead of 3 it would be...

(-60) × (-3)

= 180

The difference would be that on multiplying with positive 3 she would be 180 points in the whole but multiplying with negative three means she is 180 points in the league.

The similarity is that that whole number is same but the symbol adds a difference and the absolute value would be same too.

Answer:

$526.3 is the monthly payment

Step-by-step explanation:

We use the compound interest formula to calculate the total amount payable on the loan.

Mathematically;

A = P(1 + r/n)^nt

Where A is the amount to pay

P is amount borrowed = 22,000

r is interest rate = 7.25/100 = 0.0725

t is years = 5 years

n is the number of times we compound lee year = 12 times since it’s monthly

Substituting these values, we have

A = 22,000(1 + 0.0725/12)^(12)(5)

A = 22,000(1 + 0.006041666666667)^60

A = $31,578

Monthly payment is total amount/ number of months

There are sixty months in 5 years

So monthly payment is 31578/60 = $526.3

The maximum value of the function y=cos x/sin x at x = pi/4 is 1, so the value of m is 1.

The maximum value of the function y=cos x/sin x is when the cos x and sin x terms have the same magnitude. This happens when x=pi/4. In this case, the function reduces to y=cos(pi/4)/sin(pi/4) = 1.

Therefore, the value of m = 1.

The maximum value of the function y=cos x/sin x at x = pi/4 is 1, so the value of m is 1.

The function y=cos x/sin x has a maximum value of 1 when x = pi/4. This is because when x = pi/4, the cos x and sin x terms have the same magnitude, and the function reduces to y=cos(pi/4)/sin(pi/4) = 1. Therefore, the maximum value of the function y=cos x/sin x is 1, and the value of m is 1. This result holds true for any value of x, and is a useful tool when working with trigonometric functions.

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Answer: 22

Step-by-step explanation:

Ok, so the way I do it I multiply then divide.

For Monday I did: ?/220=55/100. what you would do is multiply across then divide by the other number, so 220x55 which is 12100 then you will divide it by 100. So 121 people voted on Monday

For Tuesday: Using the same method. ?/220=45/100 you will multiply 45x220 giving you 9900 then you will divide by 100 giving you 99. 99 people voted on Tuesday.

So to find the DIFFERENCE you need to subtract, so 121-99 leaving you with 22. Also, if you are confused how on where I got 100 from you put the percentage over 100, because percentages go from 0%-100% so you put the partial percentage over the maximum (100)  

fraction of the volume of the atom taken by nucleus = 1.07*10^-13

Space occupied by the sphere is the volume of sphere.

A straight line passing from side to side through the center of the body especially a circle or sphere is known as diameter.

Volume of sphere = 4/3πr³

Diameter of an Atom = 2.00Â

Diameter of an nucleus = 9.50×10⁻⁵Â

Radius of an Atom = 1.00Â

\(\frac{4}{3}\pi r^3=\frac{4}{3}\pi (4.75*10^(-5))^3\\\)

Volume of an Atom = \(\frac{4}{3}\pi r^3= \frac{4}{3}\pi 1^3=\frac{4}{3}\pi\)

Volume of nucleus = \(\frac{4}{3} \pi r^3=\frac{4}{3} \pi (4.75*10^-5)^3\\=\frac{4}{3} \pi 107.1718*10^-15\)

fraction of the volume of the atom taken by nucleus =

4/3π 107.17*10^-15/ 4/3π =107.17*10^-15 = 1.07 *10^-13

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For a second order differential equation t²y'' - 4ty' + 6y = 0, general solution is of the form y(t) = c₁t² + c₂t³, so another solution other than y₁(t) = t² is y₂(t) = t³.

Given solution to t²y'' - 4ty' + 6y = 0 is

y₁(t) = t²

Using the method of reduction of order, let us assume, y₂(t) = v(t)y₁(t) is a solution to t²y'' - 4ty' + 6y = 0 for suitable choice of v(t). So,

y₂ = vt²

y₂' = 2vt + t²v'

y₂'' = 2v + 2tv' + 2tv' + t²v''

y₂'' = 2v + 4tv' + t²v''

Substituting this

t²×( 2v + 4tv' + t²v'') - 4t×(2vt + t²v') + 6×(vt²) = 0

t⁴v'' = 0

v'' = 0

v' = c, c is a constant

v = ct

Therefore, y₂(t) = ct×t²

y₂ (t) = ct³

Therefore general solution will be y(t) = c₁t² + c₂t³

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Answer: y3/xz

Step by step is provided in the screenshot below

Answer:

144°

Step-by-step explanation:

m<1 =3x

m< 2= 12x

1&2 are supplementary angles, so

3x+12x= 180

15x=180

x= 12°

measure of angle 4 equals the measure of angle 2

because they're head opposite angles

m<4= 144°

The volume = LBH = x²y

.°. If a pyramid and a prism have the same base and height, their volumes are always in the ratio of 1/3xVolume of prism.

The volume of Pyramid = 1/3*x²y

h = 3 *1/3x²y/x²

h = 3*1/3x²y*1/x²

h = 3*1/3y

Jennifer has 48 nickels, which means she has 144 quarters.

Let's call the number of nickels Jennifer has "n".

Since Jennifer has three more dimes than nickels, she has n + 3 dimes.

And since she has three times as many quarters as nickels, she has 3n quarters.

We can start by figuring out the total value of the nickels and dimes in terms of cents:

n * 5 cents + (n + 3) * 10 cents = 750 cents

Expanding the right side of the equation and solving for n:

5n + 10n + 30 cents = 750 cents

15n + 30 cents = 750 cents

15n = 720 cents

n = 48

So Jennifer has 48 nickels, which means she has 3 * 48 = 144 quarters.

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The calculated test statistic is -13.04, indicating a significant difference between the sample mean and the hypothesized population mean. And 7 for part A.

To test the claim that the mean number of screens per household is greater than 7, we can conduct a one-sample z-test.

Given that the sample mean is 9.6, the population standard deviation is 1.84, and the sample size is 92, we can calculate the test statistic using the formula:

Test Statistic = (Sample Mean - Population Mean) / (Population Standard Deviation / sqrt(Sample Size))

Substituting the given values, we get:

Test Statistic = (9.6 - 7) / (1.84 / sqrt(92)) = 13.04

Since the claim states that the mean is greater than 7, we are conducting a one-tailed test. The test statistic is negative because the sample mean is greater than the hypothesized population mean.

Therefore, the value of the calculated test statistic is -13.04, rounded to two decimal places.

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Refer to the attached image.

We compare the F-statistic (under the assumption of homoskedasticity) with its critical value at 5% significance level, we decide the evidence that these restrictions help to improve the fit of the model.

Given that R2 unrestricted and R2 restricted are 0.29 and 0.06, respectively. After comparing the F-statistic with its critical value at 5% significance level, we decide to reject the null hypothesis that the three restrictions we imposed on the unrestricted model are insignificant.

The given F-statistic is a ratio of R2 in the unrestricted and restricted models. Mathematically, this is expressed as follows;F = ((R2unrestricted - R2restricted)/ q)/((1-R2unrestricted)/(n-k))whereq = number of restrictionsk = number of regressors in the unrestricted modeln = total number of observationsIn our case, q = 3, k = 5, n = 100

Hence,F = ((0.29 - 0.06) / 3) / ((1 - 0.29) / (100 - 5))= 11.31This F-statistic has (q, n-k) = (3, 92) degrees of freedom and a 5% significance level.The critical F-value from the F distribution tables is F(3,92) = 2.76Since 11.31 > 2.76, we reject the null hypothesis that the three restrictions we imposed on the unrestricted model are insignificant.

This means that the coefficients for the three restricted variables are jointly significant in the unrestricted model, that is, we can reject the null hypothesis that they are equal to zero.Therefore, we have evidence that these restrictions help to improve the fit of the model.

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Answer:

X >= 6.7

Step-by-step explanation:

So first of all, what you need is write out the equation from the given prompt

x + 2.7 >= 9.4
Next, what you really want to do is

Subtract 2.7 both side
x >= 9.4 - 2.7
x >= 6.7

Answer:

16.8

Step-by-step explanation:

14/20 = 0.7

24 x 0.7 = 16.8

(Feel free to round up or down, or keep it the same depending on the criteria of the question!)

ml = 0 is valid so the sets of quantum numbers are validated or not validated as mentioned above.

Here are the given sets of quantum numbers for the hydrogen atom which need to be validated.

Set 1 (n=3, l=3, ml=0, ms=+1/2) - Valid or Not valid

Set 2 (n=2, l=1, ml=1, ms=-1/2) - Valid or Not valid

Set 3 (n=4, l=1, ml=0, ms=-1/2) - Valid or Not valid

The first step is to understand the set of quantum numbers. Each electron in an atom is assigned a set of four quantum numbers.

The four quantum numbers are: n, l, ml, and ms. The principal quantum number n, the angular momentum quantum number l, the magnetic quantum number ml, and the spin quantum number ms are the four quantum numbers that define the electron's state.

Set 1 (n=3, l=3, ml=0, ms=+1/2)

It is not valid because ml can be from -l to +l, and when l is 3, ml can be -3,-2,-1,0,1,2,3. So, the value of ml should be from -3 to +3.

Set 2 (n=2, l=1, ml=1, ms=-1/2)

It is valid because l = 1, so ml can be -1,0,1. Therefore, ml = 1 is valid.

Set 3 (n=4, l=1, ml=0, ms=-1/2)

It is valid because l = 1, so ml can be -1,0,1. Therefore, ml = 0 is valid.

Thus, the sets of quantum numbers are validated or not validated as mentioned above.

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The roots of the equation x^2 - 14x + 24 = 0 are x1 = 2 and x2 = 12, obtained using the quadratic formula.

To find the roots of the equation x^2 - 14x + 24 = 0, we can use the quadratic formula. The quadratic formula states that for an equation in the form ax^2 + bx + c = 0, the roots can be found using the formula:

x = (-b ± √(b^2 - 4ac)) / (2a)

In this case, a = 1, b = -14, and c = 24. Plugging these values into the quadratic formula, we get:

x = (-(-14) ± √((-14)^2 - 4(1)(24))) / (2(1))

x = (14 ± √(196 - 96)) / 2

x = (14 ± √100) / 2

x = (14 ± 10) / 2

Simplifying further, we have:

x1 = (14 + 10) / 2 = 24 / 2 = 12

x2 = (14 - 10) / 2 = 4 / 2 = 2

Therefore, the roots of the equation x^2 - 14x + 24 = 0 are x1 = 2 and x2 = 12.

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