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storchak [24]
3 years ago
14

Solve P = 2l + 2w for l.

Mathematics
1 answer:
mario62 [17]3 years ago
5 0

Answer:

l = \frac{P}{2} - w

Step-by-step explanation:

P = 2l + 2w

2l = P - 2w

l = \frac{P}{2} - w

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The age of some lecturers are 42,54,50,54,50,42,46,46,48 and 48 calculate the mean age and standard deviation
rjkz [21]

Answer:

Mean age: 48

Standard deviation: 4

Step-by-step explanation:

a) Mean

The formula for Mean = Sum of terms/ Number of terms

Number of terms

= 42 + 54 + 50 + 54 + 50 + 42 + 46 + 46 + 48+ 48/ 10

= 480/10

= 48

The mean age is 48

b) Standard deviation

The formula for Standard deviation =

√(x - Mean)²/n

Where n = number of terms

Standard deviation =

√[(42 - 48)² + (54 - 48)² + (50 - 48)² +(54 - 48)² + (50 - 48)² +(42 - 48)² + (46 - 48)² + (46 - 48)² + (48 - 48)² + (48 - 48)² / 10]

= √-6² + 6² + 2² + 6² + 2² + -6² + -2² + -2² + 0² + 0²/10

=√36 + 36 + 4 + 36 + 4 + 36 + 4 + 4 + 0 + 0/ 10

=√160/10

= √16

= 4

The standard deviation of the ages is 4

3 0
3 years ago
Customers in a Bank In the Ames International Campus Bank (open 24h every day) 5 customers arrive on average during an hour. Ans
kotegsom [21]

Answer and Step-by-step explanation:

The answer is attached below

5 0
3 years ago
Select all the correct answers. Which expressions are equal to 10^5?
Vlada [557]

Answer:

b, d, and E

Step-by-step explanation:

when you multiplicate all, is the same results

7 0
3 years ago
My math problem. <br><br> 2+2/2<br><br> Please help me
trapecia [35]
Ok,First Doing2/2=1 and After
2+1=3
6 0
3 years ago
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Jlenok [28]

Answer:

$41.25

Step-by-step explanation:

We can use this formula to solve this problem:

s

=

p

−

(

d

×

p

)

Where:

s

is the sales price: what we are solving for in this problem.

p

is the original price: $55 for this problem.

d

is the discount rate: 25% for this problem. "Percent" or "%" means "out of 100" or "per 100", Therefore 25% can be written as  

25

100

.

Substituting and calculating  

s

gives:

s

=

$

55

−

(

25

100

×

$

55

)

s

=

$

55

−

$

1375

100

s

=

$

55

−

$

13.75

s

=

$

41.25

8 0
3 years ago
Read 2 more answers
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