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REY [17]
3 years ago
5

Joe is 5 years older than Caron and the sum of their ages is 31.Write am equation and solve it to figure out their ages.

Mathematics
1 answer:
Maru [420]3 years ago
8 0
I’m so out of it I think it’s 5 divided by 31
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A bank wonders whether omitting the annual credit card fee for customers who charge at least $3,000 in a year would increase the
Law Incorporation [45]

Answer:

The 95% confidence interval for the mean amount of the increase is ($541.6, $588.4). This means that we are 95% sure that the mean amount of increase of all customers who charge at least $3,000 in a year is between these two values.

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 Z-table as such z has a p-value 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.

M = 1.96\frac{267}{\sqrt{500}} = 23.4

The lower end of the interval is the sample mean subtracted by M. So it is 565 - 23.4 = $541.6

The upper end of the interval is the sample mean added to M. So it is 565 + 23.4 = $588.4

The 95% confidence interval for the mean amount of the increase is ($541.6, $588.4). This means that we are 95% sure that the mean amount of increase of all customers who charge at least $3,000 in a year is between these two values.

4 0
3 years ago
The weight of a boy was 15kg last year. If his weight increases by 3kg this year, find the percentage increase in his weight.
WARRIOR [948]
This year = 18kg
18 x .3= 5.4
The percentage change would be 5.4%. If it needs to be rounded by the nearest tenth, then it would be 5%.
I’m pretty confident this is the answer but I’m not 100% sure. I hope this helps!
4 0
2 years ago
Your Two-Day-Pass to a theme park is $76. This is $31 less than your uncle's Two-Day-Pass. what is the price of you uncle's pass
PIT_PIT [208]

Answer:

45

Step-by-step explanation:

76 - 31 = 45

7 0
3 years ago
Read 2 more answers
Mr. Moore has 21 feet of wallpaper he cuts it into sections that are each 3 feet long how many
9966 [12]

Total = 21 feet

if each is 3 feet

21/3 = 7

Therefore, there are 7 sections

5 0
3 years ago
Two accountants for the firm of Elwes and Wright are arguing about the merits of presenting an income statement in a multiple-st
olchik [2.2K]

Answer:

73,188

Step-by-step explanation:

fees plus costs minus expenses

8 0
3 years ago
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