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2 years ago

Given this graph of the function f(x) a) b) c) d) please a need help

Mathematics

1 answer:

VMariaS [17]2 years ago

4 0

Answer:

a) 2

b) -2

c) -2

d) 1/2

Step-by-step explanation:

1) f(-4) means that x=-4 and you must locate the y value on the graph

2) f(2) means that x=2 and you must locate the y value on the graph

3) f(x)=4 means that y=4 and you must locate the x value on the graph

4) f(x)=-1 means that y=-1 and you must locate the x value on the graph

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A Gallup Poll used telephone interviews to survey a sample of 1030 U.S. residents over the age of 18 regarding their use of cred

Vlada [557]

Answer:

The 95% margin of error for this estimate is 0.0274 = 2.74 percentage points.

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 $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

95% confidence level

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

72% of Americans said that they had at least one credit card

This means that $p = 0.72$

Give the 95% margin of error for this estimate.

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

$M = 1.96\sqrt{\frac{0.72*0.28)}{1030}} = 0.0274$

The 95% margin of error for this estimate is 0.0274 = 2.74 percentage points.

7 0

3 years ago

Help please asap!! What are the units and degrees that u need to put in ?

FromTheMoon [43]

Answer:

This question is unanwserable without the "Spider Tool" If you would like to revise it i'd be happy to help

Step-by-step explanation:

But the units are degrees

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3 years ago

Find the length of the prism if the width is 12 feet, the height is 18 feet, and the volume of the prism is 3240 cubic feet.

olga55 [171]

Known :

w = 12 feet

h = 18 feet

V = 3.240 feet³

Asked :

l = ...?

Answer :

V = l × w × h

3240 = l × 12 × 18

3240 = 216 l

l = 3240 ÷ 216

l = 15 feet

So, the length is 15 feet

Hope it helps and is useful :)

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3 years ago

Solve the equation 14x+7Y=28 for x

Jobisdone [24]

Answer:

x= 2-1/2

Step-by-step explanation:

14x + 7y = 28

SUBTRACT 7Y FROM BOTH SIDES (TO ISOLATE X)

14x=28-7y

DIVIDE BY 14 TO ISOLATE X

x= 2-1/2

HOPE THIS HELPS ......PLZ MARK BRAINIEST

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2 years ago

WRITE Math How are a common denominator and a common multiple alike and different?

Vesnalui [34]

That are different because that are not!!!!! the same ?

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3 years ago

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