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Rufina [12.5K]
3 years ago
14

The equation having null set as its solution set is

Mathematics
1 answer:
KIM [24]3 years ago
4 0

Answer:

  B) x = e^x

Step-by-step explanation:

The graphs of y = e^x and y = x never intersect, so the solution set will be the empty (null) set for ...

  x = e^x

_____

There is one intersection of y=x with cos(x) and with sin(x). There are an infinite number of solutions for x = tan(x).

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What is the slope of the line through (-4,2) and (3, 3)? "/ yo Choose 1 answer: 19 21 42 142 A А 7 5 B 7 5 5 7 5 7 e slope an​
NNADVOKAT [17]

Answer:

1/7

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(3-2)/(3-(-4))

m=1/(3+4)

m=1/7

5 0
3 years ago
Evaluate -5 exponent 3
Snezhnost [94]

-5^3 = -5 * -5 * -5\\-5 * -5 = 25\\25 * -5 = -125

The answer is -125.

5 0
3 years ago
What type of number has an odd number of factors
asambeis [7]
Only numbers that are perfect squares have an odd number of positive factors. all other types of numbers have an even number. so if negative factors are included, then all numbers have an even number of factors.
7 0
3 years ago
Log(5)(x+4)+log(5)(x+2)=log(5)(7x+10)
inessss [21]
 <span>Combine the logarithms first: log5(4x+3)-log5(x-1). Since it's subtract, divide the two. 

log5((4x+3)/(x-1))=2 

Make both sides the exponent of five. 5^log5 cancels out. 

5^(log5(4x+3/x-1))=5^2 

4x+3/x-1=25 

Multiply both sides by (x-1) to get rid of it under 4x+3. 

(x-1)4x+3/x-1=25(x-1) 

4x+3=25x-25 

Now subtract 4x from both sides AND add 25 to both sides. This way you'll have all the x's by itself. 

28=21x 

Divide both sides by 21. 

28/21=x 

x=1.33333333333... 


</span>
7 0
4 years ago
Annual starting salaries for college graduates with degrees in business administration are generally expected to have a populati
valkas [14]

Answer:

A sample of 139 should be taken.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Population standard deviation of $3,000.

This means that \sigma = 3000

How large a sample should be taken if the desired margin of error is $500?

A sample of n is needed.

n is found when M = 500. So

M = z\frac{\sigma}{\sqrt{n}}

500 = 1.96\frac{3000}{\sqrt{n}}

500\sqrt{n} = 1.96*3000

Dividing both sides by 500

\sqrt{n} = 1.96*6

(\sqrt{n})^2 = (1.96*6)^2

n = 138.3

Rounding up:

A sample of 139 should be taken.

7 0
3 years ago
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