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MAXImum [283]
2 years ago
10

the average age of four men is 40. If the sum of the ages of three of them is 115, what's the age of the fourth man?​

Mathematics
1 answer:
pashok25 [27]2 years ago
3 0

Answer:

35

Step-by-step explanation:

if 1 man is 37

and 1 man is 43

the 3rd man is 45

they add to 115

to average 40, we gotta add 35

this old mans giving u that!

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Please help me answer question number 3.
scoray [572]
It’s A
six more than a number which is y- (y+6)
is 10.03
so y+6=10.03
5 0
3 years ago
Which of the following SRS designs will give the most precision (smallest standard error) for estimating a population mean? Assu
Serjik [45]

Answer:

Design 3: An SRS of size 3000 from a population of size 300,000,000

Step-by-step explanation:

To check the SRS designs will give the most precision (smallest standard error) for estimating a population mean, we'll make use of the following formula:

V(y) = S²/n( 1 - n/N)

Where S² is a constant for the three SRS designs

Check the first design

n = 400

N = 4000

So, V(y) = S²/400 (1 - 400/4000)

V(y) = S²/400(1 - 0.1)

V(y) = 0.0025S²(0.9)

V(y) = 0.00225S²

V(y) = 2.25S²E-3

The second design

n = 30

N = 300

So, V(y) = S²/30 (1 - 30/300)

V(y) = S²/30(1 - 0.1)

V(y) = S²/30(0.9)

V(y) = 0.03S²

V(y) = 3S²E-2

The third design

n = 3,000

N = 300,000,000

So, V(y) = S²/3,000 (1 - 3,000/300,000,000)

V(y) = S²/3,000(1 - 0.00001)

V(y) = S²/3,000(0.99999)

V(y) = 0.00033333

V(y) = 3.33S²E-4

7 0
3 years ago
1. mutliply 3.and 3/5 enter your answer as an improper fraction in simplified form in the box.
natali 33 [55]

Answer:

1.\frac{9}{5}

2.-11\frac{1}{4}

3.10\frac{1}{8}

4.4\frac{17}{24}

5.-4\frac{7}{12}

Step-by-step explanation:

In order to solve them you just have to multiply them and add them:

3 (\frac{3}{5} )=\frac{15+3}{5}=\frac{18}{5}

-4\frac{1}{2}  (2\frac{1}{2} )=-(\frac{9}{2} )(\frac{5}{2}) =-(\frac{45}{4}) =-11\frac{1}{4}

(-2\frac{1}{4} )(-4\frac{1}{2}) =(-\frac{9}{4}) (-\frac{9}{2} )=-\frac{81}{8} =-10\frac{1}{8}

3\frac{3}{8}+ 4\frac{1}{3}=7\frac{8+9}{24} =7\frac{17}{24}

-2\frac{1}{4} +-2\frac{1}{3}=-4\frac{7}{12}

5 0
3 years ago
Solve + (-4) = -2. 6 -18 18 -2
lord [1]

Answer:

Step-by-step explanation:

No solution

4 0
2 years ago
Just don't understand all of it help!!!
svlad2 [7]
You have to substitute. So like number 1 is 3+5 because the value of t is three. 2. is -2.
3. is -9.
4 is 0.
5 is -12.
6 is 24.
7 is -96.
8 is 64.
9 is 7.
10 is 2.
5 0
3 years ago
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