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leonid [27]
3 years ago
14

Please answer ASAP. Thank you! :)

Mathematics
1 answer:
laila [671]3 years ago
7 0
You will have to find what x is to get your answer solve each to find the answer
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damon kayaks on a river near his home. he plans to kayak a total of 6.4 miles. Damon kayaks at an average speed of 1.6 miles per
Valentin [98]
The answer to your problem is 4 hours
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A car travels at a steady speed and takes 5 hours to travel 510miles what is the average speed
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So, you take 510/5 to get MPH so, his average speed is 102MPH. Now, I don't know what US State this guy is in to be going 102 miles per hour, but he is making good time! Hope this helps! Caistewart
5 0
3 years ago
Find the value of X plz
DIA [1.3K]

Answer:

x = 23

Step-by-step explanation:

Hello There!

We are given that AC and BD are diagonals of a rectangle

If you didn't know diagonals are congruent

So given that BC = 56 and AC = 2x + 10 we can use this equation to solve for x

56 = 2x + 10

now we solve for x

step 1 subtract 10 from each side

56 - 10 = 46

10 - 10 cancels out

now we have 46 = 2x

step 2 divide each side by 2

46/2=23

2x/2=x

we're left with x = 23

8 0
3 years ago
Read 2 more answers
A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From
lutik1710 [3]

Answer:

a) z = 1.645

b) The should sample at least 293 small claims.

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{1-0.9}{2} = 0.05

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

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645, which means that the answer of question a is z = 1.645.

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.

(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

M = 12, \sigma = 124.88. So

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

12 = 1.645*\frac{124.88}{\sqrt{n}}

12\sqrt{n} = 205.43

\sqrt{n} = \frac{205.43}{12}

\sqrt{n} = 17.12

\sqrt{n}^{2} = (17.12)^{2}

n = 293

The should sample at least 293 small claims.

8 0
3 years ago
Please please please
matrenka [14]

Answer:

Step-by-step explanation:

These are logically difficult,  so it makes sense to me you're asking about this.

so  A = 1/2 (big arc - small arc)

and 360 = big arc + small arc

then

360 - small arc = big arc

so rewrite  the top equation

A = 1/2(360-small arc -small arc)

63 =  1/2( 360 - 2 small arc)

2* 63 = 360 - 2 small arc

126 = 360 - 2 small arc

2 small arc = 360-126

2small arc = 234

small arc = 234/2

small arc = 117

x = 117°

8 0
3 years ago
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