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3 years ago

helpppppppppppppppppppppppppppppppppppp meeeeeeeeeeeeeeeeeeeeeeeeee pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

6 0

The answer is the third option.

m = 7.5h

The h value multiplied by 7.5 will give you the m value.

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needs to be in long division and if someone could could they tell i how to do long division i forgot how

igomit [66]

Answer is as attached.

4 0

3 years ago

Neal decides to sell his concert tickets to a sold- out show. He paid 90$ for the pair but believes he can sell them for 150% of

Pie

Answer:

Neal thinks that he can sell the tickets for $135.

Step-by-step explanation:

Original price at which Neal bought the tickets = $90

If he expects to sell them at 150% of the original,

150% as a decimal = 150/100 = 1.5

the new resale price = 1.5* $90

= $135

Therefore, Neal thinks that he can sell the tickets for $135.

5 0

3 years ago

ritu can row downstream 20km in 2 hrs and upstream 4km in 2 hrs. find the speed of rowing in still water and the speed of the cu

Marina CMI [18]

Answer:

Speed of boat in still water is 6km/h

Speed of current is 4km/h

Step-by-step explanation:

We know speed = distance / time

Let the speed of boat in still water be x

Let the speed of current be y

Hence the speed of boat, down stream = $x+y$

Distance downstream = 20km

Time taken = 2 hours

We have

$x+y=\frac{20}{2}$

$x+y=10$ ......(1)

Speed of boat upstream = $x-y$

Distance upstream = 4

Time taken = 2

We have

$x-y=\frac{4}{2}$

$x-y=2$ ...(2)

Adding (1) & (2)

$2x=12$

$x=6$

Substituting in (1) we get

$y=4$

7 0

3 years ago

Determine the minimum sample size required when you want to be 99% confident that the sample mean is within 0.50 units of the po

vfiekz [6]

Answer:

b. 224

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:

$\alpha = \frac{1-0.99}{2} = 0.005$

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 $1-0.005 = 0.995$ , so $z = 2.58$

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.

In this problem:

We want to find n, when $M = 0.5, \sigma = 2.9$ So

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

$0.5 = 2.58*\frac{2.9}{\sqrt{n}}$

$0.5\sqrt{n} = 7.482$

$\sqrt{n} = 14.964$

$(\sqrt{n})^{2} = (14.964)^{2}$

$n = 223.9$

The nearest integer number to 223.9 is 224.

So the correct answer is:

b. 224

6 0

3 years ago

7 less than a number n

Alex_Xolod [135]

Answer:

n>7

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers