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Anastasy [175]
3 years ago
15

C6.2 PA4 Special Pricing Ken Owens Construction specializes in small additions and repairs. His normal charge is $400/day plus m

aterials. Due to his physical condition, David, an elderly gentleman, needs a downstairs room converted to a bathroom. Ken has produced a bid for $5000 to complete the bathroom. He did not provide David with the details of the bid. However, they are shown here. A. The town’s social services has asked Ken if he could reduce his bid to $4,000 Should Ken accept the counter offer? B. How much would his income be reduced? C. If the town’s social services guaranteed him another job next month at his normal price, could he accept this job at $4,000?
Mathematics
1 answer:
postnew [5]3 years ago
3 0
Not reading all that LOL
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The average weight of the entire batch of the boxes of cereal filled today was 20.5 ounces. A random sample of four boxes was se
zhenek [66]

Answer:

s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

And replacing we got:

s= 0.286

And then the estimator for the standard error is given by:

SE= \frac{0.286}{\sqrt{4}}= 0.143

Step-by-step explanation:

For this case we have the following dataset given:

20.05, 20.56, 20.72, and 20.43

We can assume that the distribution for the sample mean is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And the standard error for this case would be:

SE= \frac{\sigma}{\sqrt{n}}

And we can estimate the deviation with the sample deviation:

s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

And replacing we got:

s= 0.286

And then the estimator for the standard error is given by:

SE= \frac{0.286}{\sqrt{4}}= 0.143

4 0
3 years ago
Simplify<br><br> (x^a.x^b)^a-b*(x^b.x^c)^b-c*(x^c.x^a)^c-a<br><br>step by step..
djverab [1.8K]

Answer:

= x(a+b)(a-b) . x(b+c)(b-c) .x(c+a)(c-a)

8 0
3 years ago
Read 2 more answers
1. Angle AOF has what measurement according to the protractor? A. 40 B. 140 C. 60 D. 120
fredd [130]

Answer:

140 degrees

Step-by-step explanation:

Just measure from point A to point F giving you 140 degrees.

7 0
3 years ago
Can you help me is monomials​
Novay_Z [31]

Section 2.4

-------------------------------------------------

8x^2y : 2x : 2y = 2x

This is because 8x^2y divided over 2x leads to 4xy. Dividing 4xy over 2y leads to 2x.

-------------------------------------------------

15x^6y^3 : 5y^2x^3 = 3x^3y

Note how 15 divided by 5 is 3

Also, x^6 divided by x^3 is x^3. You subtract the exponents.

Similarly, y^3 divided by y^2 is y^1 = y.

-------------------------------------------------

16y^5x^3z : -4zyx = -4y^4x^2

Divide the coefficients to get 16/(-4) = -4

The y terms divide to (y^5)/(y) = y^4. Subtract the exponents.

The x and z terms are handled the same way.

--------------------------------------------------

-8x^2 : 2x = -4x

We follow the same steps as before. This time -8/2 = -4 is the new coefficient. The x terms divide to (x^2)/x = x where x is nonzero.

---------------------------------------------------

-6xz : -2zx = 3

The coefficients divide to (-6)/(-2) = 3

The x and z terms cancel out when we divide them.

---------------------------------------------------

3y^2x : xy^2 = 3

The y^2x expression is the same as xy^2, so when we divide these terms they cancel.

5 0
3 years ago
Help Please need help
Olenka [21]
Table:

x      y

-3    0.5

-2    1

-1     2.5

0      5

1      8.5

Now, y = ax^2 + bx + c

Start replacing x = 0 and y = 5

5 = a(0) + b(0) + c => c = 5.

Now, replace any other two pair of data:

(-2, 1) => -1 = a(-2)^2 + b(-2)

-1 = 4a - 2b

(1, 8.5) => 8.5 = a(1)^2 + b(1)

8.5 = a + b

Solve the system

4a - 2b = - 1
a + b = 8.5

=>

4a - 2b = - 1
2a + 2b = 17
-------------------------

6a = 16

=> a = 16 / 6 = 8/3

b = 8.5 - a = 17/2 - 8/3 = 35/6

=> y = (8/3)x^2 + (35/6)x + 5 <--------- answer

6 0
3 years ago
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