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dimaraw [331]
2 years ago
8

2 Solve for k. -8k+ 6 = –10k + 10 k

Mathematics
2 answers:
Sever21 [200]2 years ago
8 0

Answer:

k=2

Step-by-step explanation:

tigry1 [53]2 years ago
4 0

Answer:

k=3/4

Step-by-step explanation:

-8k+6=-10k+10k

-8k+6=0

6=8k

8k=6

k=6/8

k=3/4

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The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 8 golfer
dexar [7]

Answer:

The 90% confidence interval to estimate the average difference in scores between the two courses is (-1.088, 20.252).

Step-by-step explanation:

We have the standard deviation for the differences, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 8 - 1 = 7

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 7 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.8946

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.8946\frac{15.9274}{\sqrt{8}} = 10.67

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 9.582 - 10.67 = -1.088

The upper end of the interval is the sample mean added to M. So it is 9.582 + 10.67 = 20.252

The 90% confidence interval to estimate the average difference in scores between the two courses is (-1.088, 20.252).

3 0
2 years ago
What is the value of x:
notsponge [240]

Answer:

100

Step-by-step explanation:

In a 45-45-90 triangle, the hypotenuse is always larger than either of the legs by a factor of \sqrt{2}. x is therefore:

100\sqrt{2}\div \sqrt{2}=100

Hope this helps!

6 0
3 years ago
One inch corresponds to 8 feet on an architects blueprint. Find the actual length of a wall represented by 4 1/2 inches on the b
agasfer [191]

Answer:

36 feet

Explanation:

8 feet : 1 inch = 36 feet : 4.5 inches

4 0
3 years ago
Mr. Nelson lost one of his students' test
amid [387]

Complete question :

Mr. Nelson lost one of his students' test papers. He knows that the other 4 students scored as follows: 60, 62, 56, 57. He also knows that the average score is 59.2. What is the score on the missing paper?

Answer:

61

Step-by-step explanation:

Given the following :

Total number of students = 4 + 1 missing = 5

Score on the four avaliable papers = 60, 62, 56, 57

Average score of the 5 papers = 59.2

Score on missing paper :

Sum of each score / number of papers

Sum of each score = sum of available scores + missing score

Let missing score = m

(60 + 62 + 56 + 57 + m) = 235 + m

Recall:

Average = total sum / number of observations

Hence,

59.2 = (235 + m) / 5

59.2 × 5 = 235 + m

296 = 235 + m

m = 296 - 235

m = 61

Missing score = 61

6 0
2 years ago
Divide 170 in the ratio 6:5:6
Leto [7]

Answer:

A dilation has center (0,0). Find the image of the point L (-5,0) for the scale factor 4.

Step-by-step explanation:

A dilation has center (0,0). Find the image of the point L (-5,0) for the scale factor 4.

5 0
2 years ago
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