2 x + 3 y = 11 x − 3 y = 1 What is the solution ( x , y ) to the given system of equations?

Complete question is;

The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed.

H0: μ = 4

H1: μ > 4

What type of test is being conducted in this problem? What parameter is being tested?

Answer:

Type of test = right tailed

Parameter being tested = population mean

Step-by-step explanation:

We are given the null and alternative hypothesis as;

H0: μ = 4

H1: μ > 4

Now, let's define terms;

The right tailed test and the left tailed test are both examples of one-tailed tests. This is because the area where we would reject the null hypothesis is only in one tail. Which means that in the case of left tail, the rejection region will occur only to the left of the graph while for the right tail, the rejection region will occur only to the right of the graph.

Whereas, for two tailed test, the area where we would reject the null hypothesis would not just be in one tail or one side of the graph but could be in either tail or either side of the graph. Hence, the name "two - tail".

Now, applying this to the question, the alternative hypothesis says the mean is greater than 4. On, a graph, an increase in number on the x-axis means going to the right. Thus, it is a right tailed test

Now, the sample being tested is population mean because in statistics, the symbol μ is generally used to denote population mean.

Answer:

B. 1.64b

Step-by-step explanation:

0.33b+1b+0.31b

=1.64b

Answer:

32 blocks

Step-by-step explanation:

distance between home (0,0) and mall (0,7) = 7

distance between mall (0,7) and movies (9,7) = 9

distance between movies (9,7) and store (9,0) = 7

distance between store (9,0) and home (0,0) = 9

7 + 9 + 7 + 9 = 32 blocks

Answer:

The answer is

Step-by-step explanation:

To find the percentage increase we use the formula

From the question

The original value = 12

To find the change we subtract the smaller value from the larger one

That's

Change = 20 - 12 = 8

So the percentage increase is

We have the final answer as

[tex]67\%[/tex] to the nearest whole number

Hope this helps you

Answer:

15x^2+2

Step-by-step explanation:

(10x^2 -1 + 4x) + (3 + 5x^2 - 4x)

Combine like terms

10x^2+5x^2+4x-4x-1+3

15x^2+2

Answer:

[tex] \frac{7}{15} [/tex]

Step-by-step explanation:

[tex] \frac{7}{25} \div \frac{3}{5} = \frac{7}{25} \times \frac{5}{3} = \frac{35}{75} = \frac{7}{15} [/tex]

Hope this helps ;) ❤❤❤

The calculated division of the numbers 7/25 divided by 3/5 is 7/15

From the question, we have the following parameters that can be used in our computation:

7/25 divided by 3/5

When represented as an equation, we have

7/25 divided by 3/5 = 7/25 ÷ 3/5

Represent as a product expression

So, we have

7/25 divided by 3/5 = 7/25 * 5/3

So, we have the following result

7/25 divided by 3/5 = 7/15

Using the above as a guide, we have the following:

the result is 7/15

Read more about quotient at

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Answer:

136 minutes

Step-by-step explanation:

Given :

2 miles ----> takes 17 min

1 mile -----> takes 17/2 min

hence the unit rate is (17/2) min per mile

Thus, 16 miles will take

= (17/2) miles per min x 16 miles

= (17/2) x 16

= 136 minutes

Answer:

136 min

Step-by-step explanation:

lets make it simple.

2 miles / 17 min = 16 miles / x

just cross multiply

2 x = 17 (16)

2 x = 272

x = 272 / 2

x = 136 min

Answer:

x=1

Step-by-step explanation:

because 3 over 2 plus 1 over 2 is 4 over 2 and 2 fits in 4 2 times so its 2 x but since thats solving for 2 half of that is 1, thus its x=1

The required simplified value of x is x = 1. Option 1 is correct.

Given,
Three halves plus one-half times x equals two x.
To simplify the above expression.

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication and division,

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
3/2 + 1/2 x = 2x
3/2 = 2x - 1/2 x
3x / 2 = 3 / 2
x = 1

Thus, the required simplified value of x is x = 1. Option 1 is correct.

Learn more about arithmetic here:

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Answer:

  -1

Step-by-step explanation:

Twice a number: 2n.

15 less than the number: n-15.

The sum of those: (2n) +(n-15) = 3n-15.

__

The difference between -19 and the number: -19-n

__

These values are the same, so we have ...

  3n -15 = -19 -n

  4n = -4 . . . . . . . . add n+15 to both sides

  n = -1 . . . . . . . . .  divide by -4

The number is -1.

Answer:

I hope this will be the answer... ✌️

[tex]\large{\pmb{\underline{\underline{\sf{Refraction:-}}}}}[/tex]

Refraction is the bending of a light or sound wave, or the way the light bends when entering the eye to form an image on the retina.

[tex]\large{\pmb{\underline{\underline{\sf{Examples~ Of~ Refraction:-}}}}}[/tex]

[tex]{\huge{\underline{\small{\mathbb{\pink{HOPE \ THIS \ HELPED \ UH:)}}}}}}[/tex]

Cheers !! :3

Answer:

C. 43

Step-by-step explanation:

As per above:

Correct answer choice is C. 43

Answer:

C.) 43

Step-by-step explanation:

I got it right on founders edtell

Answer:

81π for the x axis.

Step-by-step explanation:

STEP ONE: Determine the intersection.

we are given from the question that y = x^2 and y = 6x − x^2. Therefore if y = x^2, then we will have;

x^2 = 6x - x^2  ---------------------------------------------------------------------------------[1].

Solving and factorizing the equation [1] above give us x = 0 and x = 3 (that is x[6 -2x] = 0 ). Therefore, the point of intersection = (0,0) and (3,9).

STEP TWO: Determine the value for the cross sectional area.

The cross sectional area= [6x - x^2]π - [x2]^2 π. --------------[2].

The cross sectional area = -12 π[x -3]x^2.

STEP THREE: integrate the cross sectional area taking x =3 and x =0 as the upper and lower integration limits or boundaries with respect to dx to determine the vome in the x axis.

volume, v with respect to the x axis = 81π

Answer:

the 90% confidence interval is ( 48.684  , 51.316  )

Step-by-step explanation:

Given that :

the sample size = 36

Sample Mean = 50

standard deviation = 4.80

The objective is to calculate a 90% confidence interval.

At 90% confidence interval ;

the level of significance = 1 - 0.9 = 0.1

The critical value for [tex]z_{\alpha/2} = z_{0.1/2}[/tex]

[tex]= z_{0.05}[/tex] = 1.645

The standard error S.E = [tex]\dfrac{\sigma}{\sqrt{n}}[/tex]

=[tex]\dfrac{4.8}{\sqrt{36}}[/tex]

[tex]=\dfrac{4.8}{6}[/tex]

= 0.8

The Confidence interval level can be computed as:

[tex]\bar x \ \pm z \times \ \dfrac{ \sigma }{\sqrt{n}}[/tex]

For the lower limit :

[tex]\bar x \ - z \times \ \dfrac{ \sigma }{\sqrt{n}}[/tex]

[tex]=50 \ - 1.645 \times \ \dfrac{ 4.8 }{\sqrt{36}}[/tex]

[tex]=50 \ - 1.645 \times \ 0.8 }}[/tex]

=50 - 1.316

= 48.684

For the upper limit :

[tex]\bar x \ - z \times \ \dfrac{ \sigma }{\sqrt{n}}[/tex]

[tex]=50 \ + 1.645 \times \ \dfrac{ 4.8 }{\sqrt{36}}[/tex]

[tex]=50 \ + 1.645 \times \ 0.8 }}[/tex]

=50 + 1.316

= 51.316

Thus, the 90% confidence interval is ( 48.684  , 51.316  )

Answer:

253/1000, 23.5%

Step-by-step explanation:

Answer:

z = 5

Step-by-step explanation:

1.1z+5.5=2.2z

Subtract 1.1z from each side

1.1z-1.1z+5.5=2.2z-1.1z

5.5 = 1.1z

Divide each side by 1.1

5.5/1.1 = 1.1z/1.1

5 = z

Answer:

The angle of slice is approximately 16°.

Step-by-step explanation:

The slice of pizza represent the sector of a circle.

The area of a sector is:

[tex]A=\frac{1}{2}r^{2}\phi[/tex]

Here,

r = radius of the circle

Φ = angle in radians

Given:

A = 20 inches²

r = 12 inch

Compute the angle of the slice as follows:

[tex]A=\frac{1}{2}r^{2}\phi[/tex]

[tex]\phi=\frac{2\times A}{r^{2}}[/tex]

  [tex]=\frac{2\times 20}{12\times 12}\\\\=0.2778[/tex]

The angle us 0.2778 radians.

Convert the angle into degrees as follows:

[tex]\text{Angle}=0.2778\times\frac{180}{\pi}=15.9168\approx 16^{o}[/tex]

Thus, the angle of slice is approximately 16°.

Answer:

See below.

Step-by-step explanation:

1i

75 = 3 * 5^2

Multiply by 3

1ii

112 = 2^4 * 7

Multiply by 7

1iii

128 = 2^7

Multiply by 2

1iv

243 = 3^5

Multiply by 3

1v

392 = 2^3 * 7^2

Multiply by 2

Answer:

multiply 7 by 42

= 294

42 x 7 can be done as mental math, but that is challenging for some people.

Answer: 294

Break up 42 like so: 42 = 40 + 2

Then we can say,

7*(42) = 7*(40+2) = 7*40 + 7*2 = 280 + 14 = 294

The mental math part is knowing that 7*4 = 28, then you add on a zero to get 7*40 = 280. This is added to 7*2 = 14 to get the final answer above.

Answer: systematic

Step-by-step explanation:

Given, When grading English papers, the instructor checks every 4th paper for plagiarism which expresses a fixed periodic interval.

Hence, this is systematic sampling.

Answer:

x = -2

Step-by-step explanation:

The segments described in the question are equidistant (meaning they are the same length). Therefore, using algebraic techniques, we can set these two equal to each other and solve for x.

4x - 8 = 6x - 4 Combine like terms by subtracting 6x from both sides.

-2x - 8 = -4 Combine like terms by adding 8 to both sides.

-2x = 4 Divide by -2 on both sides of the equation.

x = -2

Answer:

Step-by-step explanation:

[tex]3(x+2)=2(2-x)\\\\\mathrm{Expand\:}3\left(x+2\right):\quad 3x+6\\\\\mathrm{Expand\:}2\left(2-x\right):\quad 4-2x\\\\3x+6=4-2x\\\\\mathrm{Subtract\:}6\mathrm{\:from\:both\:sides}\\\\3x+6-6=4-2x-6\\\\3x=-2x-2\\\\\mathrm{Add\:}2x\mathrm{\:to\:both\:sides}\\\\3x+2x=-2x-2+2x\\\\Simplify\\\\5x=-2\\\\Divide\:both\:sides\:by5\\\\\frac{5x}{5}=\frac{-2}{5}\\\\x=-\frac{2}{5}[/tex]

Complete Question

The  complete question is shown on the first uploaded image  

Answer:

The interval is  [tex]-0.0037 < p_1-p_2<-0.0023[/tex]

Step-by-step explanation:

From the question we are told that

   The first  sample size is  [tex]n _1 = 1068000[/tex]

    The  first sample proportion is [tex]\r p_1 = 0.089[/tex]

    The  second sample  size is  [tex]n_2 = 1476000[/tex]

    The  second sample proportion is  [tex]\r p_2 = 0.092[/tex]

Given that the confidence level is  95% then the level of significance is mathematically evaluated as

             [tex]\alpha = (100 - 95 )\%[/tex]

              [tex]\alpha = 0.05[/tex]

Next we obtain the critical value  of  [tex]\frac{\alpha }{2}[/tex]  from the normal distribution table  

The value is  

               [tex]Z_{\frac{\alpha }{2} } =z_c= 1.96[/tex]

Generally the 95% confidence interval is mathematically represented as

       [tex](\r p_1 - \r p_2 ) -z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2}} < (p_1 - p_2 ) < (\r p_1 - \r p_2 ) +z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2}}[/tex]

Here  [tex]\r q_1[/tex] is mathematically evaluated as [tex]\r q_1 = (1 - \r p_1)= 1-0.089 =0.911[/tex]

and  [tex]\r q_2[/tex]  is mathematically evaluated as  [tex]\r q_2 = (1 - \r p_2) = 1- 0.092 = 0.908[/tex]

So

       [tex](0.089 - 0.092 ) -1.96 \sqrt{ \frac{0.089* 0.911 }{1068000} + \frac{0.092* 0.908 }{1476000}} < (p_1 - p_2 ) < (0.089 - 0.092 ) +1.96 \sqrt{ \frac{0.089* 0.911 }{1068000} + \frac{0.092* 0.908 }{1476000}}[/tex]

[tex]-0.0037 < p_1-p_2<-0.0023[/tex]

Answer:

32) a) x = 3/19 ounces

33) d) 0,2 meter per minute

Step-by-step explanation:

32)

7 1/2 = 15/2

47 1/2 = 95/2

95/2 dough             15/2 sugar

  1    dough                     x = (15/2*1) / 95/2

                                       x = (15/2)(95/2)

                                       x = 15/95

                                       x = 3/19 ounces

33)

Distance      16  |    18  |  20  |   22

Time            80  |  90  | 100  |  110

Time 90 - 80 = 10

Distance 18 - 16 = 2

Each 10 minutes go 10 meters

2 / 10 = 0,2 meter per minute

Answer:

c because u can split it only once vertically but it’s not a rotationally symmetrical shape

Step-by-step explanation:

Answer:

The sample size is  [tex]n =278[/tex]

Step-by-step explanation:

From the question we are told that

    The margin of error is  [tex]E = 100[/tex]

    The standard deviation is  [tex]\sigma = 850[/tex]

Given that the confidence level is  95% then the level of significance is mathematically represented as

       [tex]\alpha = (100-95)\%[/tex]

       [tex]\alpha =0.05[/tex]

Next we obtain the critical value  [tex]\frac{\alpha }{2}[/tex] from the normal distribution table  

  The value  is  [tex]Z_{\frac{\alpha }{2} } = 1.96[/tex]

Generally the sample size is mathematically represented as

       [tex]n = \frac{(Z_{\frac{\alpha }{2}})^2}{E^2} * \sigma^2[/tex]

=>   [tex]n = \frac{(1.96)^2}{100^2} * 850^2[/tex]

=>    [tex]n =278[/tex]

Answer:

1) When this does happen, how many posters will each Avenger have completed?

24 posters each.

2) If x denotes the number of days and y denotes the number of posters, what are the equations needed to solve this problem?

y = 12 + 6x.......... Equation 1

y = 12x .......... Equation 2

Step-by-step explanation:

1) When this does happen, how many posters will each Avenger have completed?

We are told in the question:

Number of days = x

Number of posters = y

Ms. Ironperson has completed 12 posters and will complete 6 more per day.

y = 12 + 6x.......... Equation 1

Mr. Thoro has not started yet but can make 12 per day.

y = 12x................Equation 2

Hence, the equations needed to solve this problem:

y = 12 + 6x.......... Equation 1

y = 12x .......... Equation 2

We substitute 12x for y in equation 1

y = 12 + 6x.......... Equation 1

12x = 12 + 6x

Collect like terms

12x - 6x = 12

6x = 12

x = 12/6

x = 2

Hence, since x = the number of days,

The number of days = 2 days

Substitute 2 for x in Equation 2

y = 12x .......... Equation 2

y = 12 × 2

y = 24 posters.

Since y = number of posters,

number of posters = 24 posters.

We were told in the question that, when Mr Thoro catches up with Ms Ironperson, that would both have completed the same number of posters.

Hence, both Avengers would have completed 12 posters each.

Answer:

5 cm

Step-by-step explanation:

13² - 12² = x²

169 - 144 = x²

25 = x²

5 = x

Answer:

point?

Step-by-step explanation:

is this a question or a statement

Answer:

Point

Step-by-step explanation:

once two line intersect the area where they intersected becomes a point

Answer:

a) 4/25, or 0.16, or 16%

b) 1/5, or 0.2, or 20%

c) The first option - the theoretical and experimental values should become closer the more trials that are performed.

Step-by-step explanation:

a) 4 of Tammy's 25 spins landed on black, so the experimental probability is 4/25, or 0.16, or 16%.

b) The spinner is split into 5 equal sections. Assuming it is fair, the chance of landing in any given section for a single spin is 1/5, or 0.2, or 20%.

c) The theoretical and experimental values should get closers the more trials you do.

For example, consider 1 coin flip vs 100. The theoretical probability of landing on a given side of a coin is 1/2, or 0.5, or 50%. With a single flip, your experimental probability will either be 0% or 100%, both off of the theoretical probability by 50%. After 100 flips however, the experimental and theoretical probabilities will be much closer to each other.

i believe its 4

Step-by-step explanation: