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3 years ago

Help! I can't post the file but I will type it here:

Mathematics

1 answer:

kow [346]3 years ago

5 0

Answer:

its either A or D i cant solve the rest because im abought to go

Step-by-step explanation:

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The ages of 3 siblings combined is 27.the oldest is twice the age of the youngest.the middle child is 3 years older than the you

Olenka [21]

I ended up with the ages of 12, 3, and 2
if u multiply 12 by 2 u end up with 24 then u add 3 and get 27
but I think i have i worked out wrong

8 0

4 years ago

A veterinarian sampled 235 sheep from a large herd to obtain a 90% confidence interval for the mean weight of wool from the shee

stiv31 [10]

Answer:

A. Wider and would have a smaller chance of missing the true mean.

Step-by-step explanation:

Margin of error for a confidence interval:

The margin of error for a confidence interval is given by:

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

In which z is related to the confidence level(the higher the confidence level, the higher the value of z), $\sigma$ is the standard deviation of the population and n is the size of the sample.

95% confidence interval

Would be wider than the 90% confidence interval, due to the higher value of z.

Also, a x% confidence interval has a x% chance of having the true mean, and a (100-x)% probability of missing the true mean.

Then, a 95% confidence interval has a smaller(5%) chance of missing the true mean compared to the 90% confidence interval(10%). This means that the correct answer is given by option A.

4 0

3 years ago

Pls answer this questionnnn

pickupchik [31]

Jo makes 170 minutes call. There are 150 free ones
170 - 150 = 20
20 minutes are "what Jo has to pay"
Jo sends 182 texts. There are 150 free ones
182 - 150 = 32
32 texts are "what Jo has to pay"

Monthly charge = 16p, 13p for each extra minute, 15p for each extra text.
13(20) = 260p
15(32) = 480p

480p + 260p + 16 = 740p + 16

740p + 16 is your answer (if p = pounds, add 16 to it, i'm not sure what p stands for though. If it is cents, divide 100 from 740 and take out the p, then add total to 16 to get answer.)

hope this helps

4 0

3 years ago

How should i solve number 2 ?

MAXImum [283]

X-1%x^2-2x-3 =0
X-1=0
X=1 , ≠-1 , x≠3

Answer X=1

6 0

3 years ago

Three friends collected aluminum cans from the neighborhood to recycle in total they receive 300 cans many collected 90 Jim coll

spin [16.1K]

Given

Total cans = 300

Manny= 90

Jim =100

Bob=110

Now their percentage

Manny percentage

$\begin{gathered} manny=\frac{90}{300}\times100\text{ \%} \\ \\ Manny\text{ percentage=}\frac{90}{3}\text{ \%} \\ \\ Manny\text{ percentage =30 \%} \end{gathered}$

Jim Percentage

$\begin{gathered} Jim=\frac{100}{300}\times100\text{ \%} \\ Jim\text{ percentage=}\frac{1}{3}\times100\text{ \%} \\ Jim\text{ percentage=33.333\%} \end{gathered}$

Bob percentage

$undefined$

6 0

1 year ago