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kramer
3 years ago
5

WILL MARK BRAINLIESTTTTT

Mathematics
1 answer:
lions [1.4K]3 years ago
5 0

Answer:

1. neither 2. linear 3. exponential 4. linear

Step-by-step explanation:

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The substance x and y had retention times of 16.4 and 17.63 minutes on a 30 cm column. unretained species had 1.30 minutes reten
s2008m [1.1K]
Column Resolution
Rs = 2[(tr)y - (tr)x]/[Wx + Wy]
= 2[17.63 - 16.4]/ [1.11 + 1.21] = 1.06

Average no. of plates in the column for substance x 
N = 16(tr/ W)^2
N = 16(16.4/1.11)^2
N = 3490 plates 

Average no. of plates in the column for substance y 
N = 16(tr/ W)^2
N = 16(17.63/1.21)^2
N = 3397 plates 

Plates Height
H = L/N

For substance x 
H = 30/3490
H= 0.00916905 cm/plate 

For substance y 
H = 30/3397
H = 0.00883132 cm/plate 





3 0
3 years ago
13 times an unknown number added 72 equals -23 times the unknown number
uysha [10]

Answer:

X=2

Step-by-step explanation:

Let the unknown number be x

13*x+72=-23*x

13x+72=-23x(collect like terms and add -72 to both sides)

13x+72-72=-23x-72=13x=-23x-72(collect like terms again and add +23x to both sides)

13x+23x=-23x-72+23x=36x=-72

36x=-72(divide both sides by the coefficient of x;36 on both sides)

36x/36=-72/36

X=2.


6 0
4 years ago
A circular swimming pool has a radius of 15 feet. The family that owns the pool wants to put up a circular fence that is 5 feet
ser-zykov [4K]

Answer: HI

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
( 2x + 5 ) + ( 3x - 7
musickatia [10]

Answer:

5x-2

Step-by-step explanation:

2x+3x=5x

5-7=-2

7 0
3 years ago
Read 2 more answers
Sam bought a car for $25,000 in 2009. Since then the car has depreciated in value y $1500 a year. Write a function that will all
Feliz [49]

Answer:

$17,500

Step-by-step explanation:

Initial value of the car was $25,000, for t = 0.

After one year, the value would be $25,000 - ($1,500/year) (1), or $23,500.

After t years, the value would be $25,000 - ($1,500/year) t

After 5 years, the value would be worth

$25,000 - ($1,500/year) (5 years) = $17,500.

4 0
3 years ago
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