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Cloud [144]
2 years ago
10

Solve for m M/4 - 7= 3

Mathematics
1 answer:
Leokris [45]2 years ago
3 0

Answer:

40

Step-by-step explanation:

3+7=10

10x4=40

40/4-7=3

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The number of calories burned at the gym is normally distributed with a mean of 425 and a standard deviation of 51. Find the Z-s
Galina-37 [17]

Answer:

(a) -3.708

(b) 1.706

(c) 0.490

Step-by-step explanation:

The z-score of normal distribution is given as:

z=\frac{x-\mu}{\sigma}

(a)

Given:

Score is, x=268

Mean value is, \mu =425

Standard deviation is, \sigma = 51

z-score is, z=\frac{268-425}{51}=\frac{-157}{51}=-3.078

(b)

Given:

Score is, x=512

Mean value is, \mu =425

Standard deviation is, \sigma = 51

z-score is, z=\frac{512-425}{51}=\frac{87}{51}=1.706

(c)

Given:

Score is, x=450

Mean value is, \mu =425

Standard deviation is, \sigma = 51

z-score is, z=\frac{450-425}{51}=\frac{25}{51}=0.490

6 0
3 years ago
Which choice correctly shows rounding to the hundredths place?
Romashka [77]
The correct answer would be the last one.

3.8765+4.824+1.733 > 3.88 +4.82+1.73 

This link is a good visual prompt of where the tenths, hundredths, thousandths, etc are.

Explanation:
Okay we are rounding to the hundredths. When we round a decimal up, we are basically being lazy so we just simplify the number. When we look at a number we are going to round we first need to spot where we are rounding up. In this case it is the hundredths.  Ex. 4.234/ Now the number that we are rounding "needs help from his buddy on his right" If the number on the right is 5 or greater, he is strong enough to help out. But if the number is 4 or lower he is too weak to help out. So lets do an example: Ex. 4.234. We see that 3 is the hundredths and the 3 turns to his buddy on the right and asks if can help. But since his buddy is 4 he can't help out.

Working out the problem:
The first option we are given the answers are in tenths so we can rule that out

The second option we are given the answers are rounded into hundredths so lets round the numbers/  3.825= 3.83, but the answers given (3.82) do not match up.

The third option: The answers are in hundredths so lets round the numbers.. 3.824= 3.82, but the answers given(3.81) do not match up

*Now by process of elimination you would now know that the 4th is the correct answer but lets work it out anyways, plus doing that is a bad habit to get into*

The fourth option: the answers given are in hundredths so let round the numbers.. 3.8765 (tricky since the answer all the way to the right is above 5 it rounds the helping buddy up) like so: 3.877... 3.877= 3.88. This turns out to be the right answer as you round up all of the hundredths places. 

I hope this helps you out and hope you can understand this! Have a GREAT DAY!

4 0
3 years ago
Read 2 more answers
318.9 in scintific notation
ivanzaharov [21]
Scientific notatino is
(number that is greater than or equal to 1 and less than 10) times (10^x)


so
318.9
we need to make it less than 10
move decimal 2 places to left
3.189

to make it the same number, we multipl it by 10^2 to make it go back

scientific is
3.189 times 10^2
3 0
3 years ago
Solve for x. 4/3 = 24/x<br> Help me please!!
postnew [5]
Answer: x=18
First cross multiply 4/3=24/x to get 4x= 3*24
Then simplify: 4x=72; x=18
5 0
2 years ago
Use the function f(x) = (3 - x)/(x2 + 4). Find the value of f(2).
sweet [91]

Answer:

f(2) = 1/8

Step-by-step explanation:

f(2) = (3 - (2))/((2)2 + 4)

f(2) = 1/8

8 0
2 years ago
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