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Ivenika [448]
3 years ago
11

The value of x + x(xx) when x = 2 is: (a) 10, (b) 16, (c) 18, (d) 36, (e) 64

Mathematics
2 answers:
kompoz [17]3 years ago
6 0
X+x(xx) means
x plus x times the quantity x times x
2 plus 2 times the quantity 2 times 2
pemdas
2 plus 2 times 4
2 plus 8
10

A is answer
miskamm [114]3 years ago
3 0
Solution:

x + x(xx)

Put the value of x = 2 in the above expression we get,

2 + 2(22)

= 2 + 2(2 × 2)

= 2 + 2(4)

= 2 + 8

= 10

Answer: (a)
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The American Management Association is studying the income of store managers in the retail industry. A random sample of 49 manag
VashaNatasha [74]

Answer:

a) The 95% confidence interval for the income of store managers in the retail industry is ($44,846, $45,994), having a margin of error of $574.

b) The interval mean that we are 95% sure that the true mean income of all store managers in the retail industry is between $44,846 and $45,994.

Step-by-step explanation:

Question a:

We have 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 Z-table as such z has a p-value of 1 - \alpha.

That is z with a p-value 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.

M = 1.96\frac{2050}{\sqrt{49}} = 574

The lower end of the interval is the sample mean subtracted by M. So it is 45420 - 574 = $44,846.

The upper end of the interval is the sample mean added to M. So it is 45420 + 574 = $45,994.

The 95% confidence interval for the income of store managers in the retail industry is ($44,846, $45,994), having a margin of error of $574.

Question b:

The interval mean that we are 95% sure that the true mean income of all store managers in the retail industry is between $44,846 and $45,994.

5 0
3 years ago
Simplify (6 +i)(8 – 3i)<br><br> 51 – 10i<br> 48 – 32i<br> 45 – 10i<br> 48 – 10i – 3i^2 ...?
mote1985 [20]
<span>= 48 - 18i + 8i - 3i</span>²<span>
= 48 – 10i – 3i</span>²
4 0
3 years ago
I need help with this duhhh
liubo4ka [24]

Answer:

Step-by-step explanation:

4. (6^10)^-7 is when the exponents should be multiplied

   answer is B

5. (7^3)^-2 = (7^-6)

     1/7^6 = 1/(7x7x7x7x7x7)

answer is A

2. 11^-4/11^8= 1/11^(8+4) = 1/11^12

   answer is A

3. (2^5/3^2)^4= 2^20/3^8

   answer is A

4 0
3 years ago
If the distance between two objects is increased, the gravitational attraction between them will: increase decrease remain the s
natulia [17]
It decreases
The further two objects are, the gravitational attraction decreases and the closer two objects are, the gravitational attraction increases
8 0
3 years ago
Read 2 more answers
choose the equation of the horizontal line that passes through the point (−5, 1). y = −5 x = 1 y = 1 x = −5
crimeas [40]
Horizontal line passing through (-5, 1) is y = 1
8 0
3 years ago
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