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3 years ago

The table shows a bank account

Mathematics

1 answer:

Butoxors [25]3 years ago

3 0

Answer:

I think It's 16

Step-by-step explanation:

I used two calculators and did 44-28. Idk if this is very helpful or not, bu here ya go!

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julia, keller and israel all made 219.75 dollars in total. keller made 37.50 and israel made 12 less than keller. what did each

krek1111 [17]

Keller=37.50
Israel=25.50
Julia=194.25

8 0

3 years ago

NEED HELP ASAP

poizon [28]

The answer is -4,0 4,8 because u would solve for one variable in one of the equations and then substitute the result into the other

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3 years ago

Please help me

victus00 [196]

Answer:

The lines are perpendicular, meaning if they were to intersect, they would form four right angles.

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3 years ago

together, steve and tom sold 7777 raffle tickets for their school. steve sold 1414 more than twicetwice as many raffle tickets

storchak [24]

Steve = S , Tom = T
1) S+T = 7777
2) S= 1414 + 2T

put 2) in 1)

1414+2T + T = 7777
1414 +3T = 7777
3T = 6363
so T = 2121
then Steve sold 1414+2(2121) = 1414+4242=5656 tickets
while Tom sold 2121 tickets

5 0

3 years ago

A simple random sample of 60 items resulted in a sample mean of 65. The population standard deviation is 14. a. Compute the 95%

bazaltina [42]

Answer:

The 95% confidence interval for the population mean is between 61.5 and 68.5.

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 Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find 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.

$M = 1.96*\frac{14}{\sqrt{60}} = 3.5$

The lower end of the interval is the sample mean subtracted by M. So it is 65 - 3.5 = 61.5

The upper end of the interval is the sample mean added to M. So it is 65 + 3.5 = 68.5

The 95% confidence interval for the population mean is between 61.5 and 68.5.

6 0

3 years ago

Read 2 more answers