Which expressions have the same solution as
Check all that apply.
-4(6)?
04(-6)
4(-6)
6(-4)
-8(2)
12(-2)

Answer:

We conclude that there is an equal or larger proportion of Republicans in favor of lowering the standards.

Step-by-step explanation:

The complete question is: A nationwide sample of influential Republicans and Democrats was asked as a part of a comprehensive survey whether they favored lowering environmental standards so that high-sulfur coal could be burned in coal-fired power plants. The results were:

Number sampled: 1,000 (republican) , 800 (democrats)

Number in favor: 200 (republican) , 168 (democrats)

At the 0.02 level of significance, can we conclude that there is a larger proportion of Democrats in favor of lowering the standards? Determine the p-value.

Let [tex]p_1[/tex] = proportion of Republicans in favor of lowering the standards.

[tex]p_2[/tex] = proportion of Democrats in favor of lowering the standards.

SO, Null Hypothesis, [tex]H_0[/tex] : [tex]p_1 \geq p_2[/tex]     {means that there is an equal or larger proportion of Republicans in favor of lowering the standards}

Alternate Hypothesis, [tex]H_A[/tex] : [tex]p_1 < p_2[/tex]     {means that there is a larger proportion of Democrats in favor of lowering the standards}

The test statistics that would be used here Two-sample z-test for proportions;

                         T.S. =  [tex]\frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2} } }[/tex]  ~ N(0,1)

where, [tex]\hat p_1[/tex] = sample proportion of Republicans in favor of lowering the standards = [tex]\frac{200}{1000}[/tex] = 0.20

[tex]\hat p_2[/tex] = sample proportion of Democrats in favor of lowering the standards = [tex]\frac{168}{800}[/tex] = 0.21

[tex]n_1[/tex] = sample of Republicans = 1000

[tex]n_2[/tex] = sample of Democrats = 800

So, the test statistics  =  [tex]\frac{(0.20-0.21)-(0)}{\sqrt{\frac{0.20(1-0.20)}{1000}+\frac{0.21(1-0.21)}{800} } }[/tex]

                                     =  -0.52

The value of z test statistics is -0.52.

Now, P-value of the test statistics is given by the following formula;

            P-value = P(Z < -0.52) = 1 - P(Z [tex]\leq[/tex] 0.52)

                          = 1 - 0.6985 = 0.3015

Now, at 0.02 significance level, the z table gives a critical value of -2.054 for left-tailed test.

Since our test statistic is more than the critical value of z as -0.52 > -2.054, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which we fail to reject our null hypothesis.

Therefore, we conclude that there is an equal or larger proportion of Republicans in favor of lowering the standards.

Answer:

The margin of error is 0.0206 = 2.06 percentage points.

The 95% confidence interval for the proportion of all student athletes in this country have been subjected to some form of hazing is (0.6794, 0.7206).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

For this problem, we have that:

[tex]n = 1900, \pi = 0.7[/tex]

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

The margin of error is:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]M = 1.96\sqrt{\frac{0.7*0.3}{1900}} = 0.0206[/tex]

The margin of error is 0.0206 = 2.06 percentage points.

The lower limit of this interval is:

[tex]\pi - M = 0.7 - 0.0206 = 0.6794[/tex]

The upper limit of this interval is:

[tex]\pi + M = 0.7 + 0.0206 = 0.7206[/tex]

The 95% confidence interval for the proportion of all student athletes in this country have been subjected to some form of hazing is (0.6794, 0.7206).

Answer:

The answer is C.

Step-by-step explanation:

If you type into the calculator for sin(40), you will get approximately 0.64 if you round it to 2 decimal places :

[tex] \sin(40) = 0.6427876097[/tex]

[tex] \sin(40) ≈ 0.64[/tex]

Answer:

x=1, 2, 3, 4, 5, 6

Step-by-step explanation:

Let's use logic. You can not have negative pizzas, and I assume you can not have decimals of pizzas.

That means that with the coupon you can only buy whole pizzas up to 6.

So the domain or x is1, 2, 3, 4, 5, 6

Answer:

2.178

hope it helps!

Answer:

2.718

______________________________

Answer:

321

Step-by-step explanation:

Principal amount = $11,500

Simple interest = 6.7%

time :5 months

as simple interest is calculated for a year, time needs to be calculated in years

12 months comprises 1 year

1 month is equivalent to 1/12 years

thus, 5 month is equivalent to (1/12)* 5 years

time in years = 5/12

Simple interest is calculated by formula

SI = p*r*t/100

where SI is simple interest earned

p is principle amount

r is rate of interest

t is time in years

substituting the value of p, r and t in the formula for SI, we have

SI = (11500*6.7*5)\12*100 = 321.04

interest,the account gained after 5 months is 321.

Answer:

A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola

y=5−x^2. What are the dimensions of such a rectangle with the greatest possible area?

Width =

Height =

Width =√10 and Height [tex]= \frac{10}{4}[/tex]

Step-by-step explanation:

Let the coordinates of the vertices of the rectangle which lie on the given parabola y = 5 - x² ........ (1)

are (h,k) and (-h,k).

Hence, the area of the rectangle will be (h + h) × k

Therefore, A = h²k ..... (2).

Now, from equation (1) we can write k = 5 - h² ....... (3)

So, from equation (2), we can write

[tex]A =h^{2} [5-h^{2} ]=5h^{2} -h^{4}[/tex]

For, A to be greatest ,

[tex]\frac{dA}{dh} =0 = 10h-4h^{3}[/tex]

⇒ [tex]h[10-4h^{2} ]=0[/tex]

⇒ [tex]h^{2} =\frac{10}{4} {Since, h≠ 0}[/tex]

⇒ [tex]h = ±\frac{\sqrt{10} }{2}[/tex]

Therefore, from equation (3), k = 5 - h²

⇒ [tex]k=5-\frac{10}{4} =\frac{10}{4}[/tex]

Hence,

Width = 2h =√10 and

Height = [tex]k =\frac{10}{4}.[/tex]

Answer:

0.8

Step-by-step explanation:

(2 x 10^-4)

= 0.0002

(4x10^3)

= 4000

0.0002 x 4000 = 0.8

Answer: 22, 60

Step-by-step explanation:

x+ x + 38 = 82

2x + 38 = 82

2x = 82 - 38

x = 44 / 2 = 22

Answer: 22, 60

Step-by-step explanation:

We can use system of equations to solve this. Let's use 1 for one number and y for the second number.

Equation 1

x+y=82

Equation 2

x+38=y

Since we know what y is, we can substitute it into the first equation.

x+(x+38)=82

x+x+38=82

2x+38=82

2x=44

x=22

Now that we know x, we cna plug it into any equaiton to find y.

(22)+38=y

y=60

Answer:

Profit of $11.00

Step-by-step explanation:

44÷2=22

22×$3.50=$77

$77.00-$66.00=$11.00/profit

Answer:

48 cm

Step-by-step explanation:

Given:

Distance of rod from the wall = 45 cm

Distance of rod from the light = 15 cm

Length of rod = 12 cm

We can see that <DAM and <BAF are equal

Also, <DMA and <BFM are equal because they are corresponding angles

To find the length of the shadow, let's take the equation

[tex] \frac{DM}{BF} = \frac{AM}{A.F} [/tex]

Where.:

DM = ½ of length of the rod = ½*12 = 6

A.F = 15 + 45 = 60 cm

AM = 15 cm

Therefore,

[tex] \frac{DM}{BF} = \frac{AM}{A.F} [/tex]

[tex]= \frac{6}{BF} = \frac{15}{60} [/tex]

Cross multiplying, we have:

15 * B.F = 60 * 6

15 * B.F = 360

[tex]BF = \frac{360}{15}[/tex]

BF = 24 cm

The shadow on the wall =

2 * BF

= 2 * 24

= 48 cm

The shadow on the wall is 48 cm

Answer:

x=3

Step-by-step explanation:

graphed on desmos.com

Answer:

49 cars and 14 bikes

Step-by-step explanation:

we know [tex]7^{2}[/tex] is 49. 7 × 7 = 49

to match that, 7 × 2 = 14

14 plus 49 is 63

Answer:

yes, the birdhouse has a surface area of 210 inches while the plywood has 1152 inches of surface area

yes the birdhouse is 210 inches while the wood is 1152

Answer:

90 different ways

Step-by-step explanation:

We have a total of 10 members, and we want to find how many groups of 2 members we can have, where the order of each member in the group of 2 is important, so we have a permutation problem.

To solve this problem, we need to calculate a permutation of 10 choose 2.

The formula for a permutation of n choose p is:

[tex]P(n, p) = n! / (n - p)![/tex]

So we have:

[tex]P(10, 2) = 10! / (10 - 2)![/tex]

[tex]P(10, 2) = 10! / 8![/tex]

[tex]P(10, 2) = 10*9 = 90[/tex]

So there are 90 different ways of choosing a president and a vice-president.

Answer:

$2.7

Step-by-step explanation:

Let the price of one apple be x

and the price of one orange y

Hence ;

One apple and 3 oranges would cost:

x + 3×y = $5.10----------------------------(1)

One apple and 5 oranges would cost;

x + 5×y = $7.50--------------------------(2)

Subtracting eqn (1) from (2), we have :

x-x + 5y -3y = 7.5- 5.1

2y = 2.4

y = $1.2

From eqn(1)

x + 3y = $5.10

x= $5.10-3($1.2) = $5.10-$3.6 = $1.5

Hence x=$1.5 and y= $1.2

We are required to find the cost of one apple and one orange, hence :

x+y = $1.5+$1.2= $2.7

Answer:

1/9 or 0.11

Step-by-step explanation:

1/3 divided by 3

= 1/3 / 3

= 1/3 / 3/1

= 1/3 x 1/3 (the rule is a/b / c/d = a/b * d/c)

= 1/9 or 0.11(1 continues repeating for ever so just make it 0.11)

Answer: The first one

Step-by-step explanation:

If you take a look at the light pink squares, you can count three on the top and three on the bottom. Therefore, when looking at it from the top, you’ll see the first one.

I hope you found my answer helpful! If you did, give it a five-star rating and a thanks! I would really appreciate it!

Even a brainliest if you feel like it! ;)

Answer:

the first image will b da answer

Step-by-step explanation:

happy to help ya :)

Answer:

The range in which we can expect to find the middle 68% of most pregnancies is [245 days , 279 days].

Step-by-step explanation:

We are given that the lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days and a standard deviation of 17 days.

Let X = lengths of pregnancies in a small rural village

SO, X ~ Normal([tex]\mu=262,\sigma^{2} = 17^{2}[/tex])

Here, [tex]\mu[/tex] = population mean = 262 days

         [tex]\sigma[/tex] = standard deviation = 17 days

Now, the 68-95-99.7 rule states that;

So, middle 68% of most pregnancies is represented through the range of within one standard deviation points, that is;

[ [tex]\mu -\sigma[/tex] , [tex]\mu + \sigma[/tex] ]  =  [262 - 17 , 262 + 17]

                          =  [245 days , 279 days]

Hence, the range in which we can expect to find the middle 68% of most pregnancies is [245 days , 279 days].

Answer:

(C) 1466

Step-by-step explanation:

The hour hand makes one revolution each 12 hours. So it makes 2 revolutions a day.

The minute hand makes one revolution each hour. So it makes 24 revoulutions a day.

The second hand makes one revolution each minute. So it makes 24*60 = 1440 revolutions a day.

In total:

2 + 24 + 1440 = 1466

The correct answer is C.

Answer:

Step-by-step explanation:

[tex]\sqrt[3]{x^{2} }[/tex] written as a radical expression

The radical is the symbol that is used to represent the root in the expression n√x. The index in the given expression x^(2/3) when rewritten as a radical expression is 3.

The radical is the symbol that is used to represent the root in the expression n√x.

Given the expression [tex]x^{\frac23}[/tex], which can be rewritten in the form of radical as,

[tex]x^{\frac23}\\\\[/tex]

[tex]= x^{2 \times \frac13}\\\\[/tex]

Using the law of exponent, [tex]a^{\frac1x} = \sqrt[x]{a}[/tex], then we can write,

[tex]= \sqrt[3]{x^2}[/tex]

Now, in the given expression 3 is an index, x² is the radicand and the symbol √ is known as the radical.

Hence, the index in the given expression x^(2/3) when rewritten as a radical expression is 3.

Learn more about the Radical here:

https://brainly.com/question/1369233

#SPJ2

Answer:

If you earn $15 every week then you will have earned $75 by the end of 5 weeks.

Step-by-step explanation:

If $15 is 1 week,

and you need to find how much money after 5 weeks,

you multiply by the same number on both sides

1 = 15

1*5 = 15*5

5 = 75

So after 5 weeks you get $75

Answer:

20

Step-by-step explanation:

Since chord AB and DE are at equal length from the centre, they are equal in length.

AB = DE

3x-7 = 5(x-5)

3x-7 = 5x-25

-7+25 = 5x -3x

18 = 2x

Dividing both side by 2

x = 9

Now

AB = 3(9)-7

= 27 -7

= 20

Solution,

radius=10 cm

Circumference of circle=2 pi r

=2*3.142*10

=62.84 cm

hope it helps

Good luck on your assignment

Answer:

If 1/5 are chocolate chip, then 4/5 are not chocolate chip because 1 - 1/5 = 4/5. Half of 4/5 are peanut butter. Half of 4/5 is 2/5, so 2/5 of the cookies are peanut butter.

hope it helps!!!!! :]

Answer:

$0.45+19*$0.35= $7.1

Step-by-step explanation:

first minute= $0.45

subsequent minutes= $0.35

cost per 20 min= $0.45+19*$0.35= $7.1

cost per x min= 0.45+(x-1)*0.35= 0.35x +0.10

Answer:

Step-by✔ 0.45 + 0.35(19)  

✔ $7.10

Answer:

3/4 lbs more

Step-by-step explanation:

1 1/2 - 3/4 = 3/4

You need 3/4 lbs more coffee to have 1 1/2 lbs

Answer:

it takes approximately 11 years and 3 months (11.4 years) for Belinda's investments to double.    

Step-by-step explanation:

To calculate the time it takes for Belinda's money to double, we will use the simple interest formula as shown below:

Simple interest = P × R × T

where:

P = principal = $800

R = Rate in decimal = 8.75% = 0.0875

T = time = ???

simple interest = $800 ( her money doubles)

∴ 800 = 800 × 0.0875 × t

800 = 70 × t

∴ t = 800 ÷ 70 = 11.4 years. (11 years and 3 months)

Therefore after approximately 11 years and 3 months, Belinda's investments doubles

Answer:

8.23

how long would it take belinda's $800 investment to double in value if she has a bond with a 8.75% interest rate?

Answer:

432

Step-by-step explanation:

Volume is equal to the length*width*height that is 6*6*2*3*6(basically multiply them all in simple terms)=432

Answer:

2 + 3+ 6

Step-by-step explanation:

You are supposed to multiply the length, width, and height not add it.

Answer:andrew Jackson

Answer:

D

Step-by-step explanation:

thank the person above ☝☝☝

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