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3 years ago

10

Fill in the missing number. 6 x 4 =( x 4) + (3 x 4)

1 answer:

amid [387]3 years ago

7 0

Answer:

6x4= 24

x4)+(3x4)=12

bsnskzifkznsnaksifi

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Direct mail advertisers send solicitations ("junk mail") to thousands of potential customers in the hope that some will buy the

Arte-miy333 [17]

Answer:

The 90% confidence interval for the percentage of people the company contacts who may buy something is between 10.82% and 14%

Step-by-step explanation:

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

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 1160, \pi = \frac{144}{1160} = 0.1241$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.1241 - 1.645\sqrt{\frac{0.1241*0.8759}{1160}} = 0.1082$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.1241 + 1.645\sqrt{\frac{0.1241*0.8759}{1160}} = 0.14$

The 90% confidence interval for the percentage of people the company contacts who may buy something is between 10.82% and 14%

3 0

4 years ago

4. ABCD below is a rectangle. BE=6x+2 and ED=4x+6. Find the length of AC.

Nikolay [14]

Answer:

28 units

Step-by-step explanation:

ABCD is a rectangle. AC and BD are diagonals intersecting at point E.

Diagonals of a rectangle bisect each other.

$\therefore BE = ED$

$\therefore 6x + 2 = 4x + 6$

$\therefore 6x - 4x= 6-2$

$\therefore 2x= 4$

$\therefore x= \frac{4}{2}$

$\therefore x= 2$

$\therefore 6x + 2= 6*2+2= 12+2= 14$

$\therefore BE= 14\: units$

$\because BD = 2BE$

$\therefore BD = 2(14)= 28\: units$

$\because AC = BD$ (diagonals of a are equal in measure)

$\therefore AC = 28\: units$

8 0

3 years ago

3 − 1 = 5 + 10 = −5 1/2 Check whether the given value of is a solution to the equation. Justify your answer.

andrey2020 [161]

Answer:

$x = -5\frac{1}{2}$ is the solution

Step-by-step explanation:

Given

$3x - 1 = 5x + 10$ --- Correct expression

$x = -5\frac{1}{2}$

Required

Determine if the given solution is correct

To do this, we simply solve for x in the given equation.

So, we have:

$3x - 1 = 5x + 10$

Collect like terms

$3x - 5x = 1 + 10$

$-2x = 11$

Divide both sides by -2

$\frac{-2x}{-2} = \frac{11}{-2}$

$x = -\frac{11}{2}$

$x = -5\frac{1}{2}$

4 0

3 years ago

For the function f(x) = -5x, which ordered pair will be a point on the graph of the function?

Kipish [7]

The answer would be D 0,0

4 0

3 years ago

I need help please plzzzzzzzzzzzzzzzzzz

ladessa [460]

Answer:

One solution, 8x + 9

Step-by-step explanation:

3x + 9 + 4x + x

Add the x's

8x + 9

<em>good luck, hope this helps :)</em>

8 0

3 years ago

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