eastonstelter

25.03.2021 •

Mathematics

Pleas help me I'll give you brainliest
Which of the following is equivalent to 4x² +6x/4x+2.
A) x
B) x+4
C) x-2/4x+2
D) x+1-2/2x+2

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Ответ:

dtilton2003

09.01.2021

Mathematics

Step-by-step explanation:

From the given information:

The mean of the readings is: $=\dfrac{175+104+164+193+131+189+155+133+151+ 176}{10}$

$= \dfrac{1571}{10}$

= 157.1

The standard deviation (SD) can be computed by using the expression:

$SD =\sqrt{ \dfrac{\sum_f(x_i - \bar x)^2}{n-1}}$

$SD =\sqrt{ \dfrac{(175-157.1)^2+(104-157.1)^2+(164-157.1)^2+...+(176-157.1)^2}{10-1}}$

Standard deviation = 28.195

∴

FOr the EDTA complexes;

The signal detection limit = (3*SD) + $y_{blanks}$

= (3*28.195) + 50

= 84.585 + 50

= 134.585

We need to point out that the value of the calibration curve given is too vague and it should be (1.75 x 10^9 M^-1) as oppose to (1.75 x 10^-9 M^-1)

The concentration of detection limit is:

$=\dfrac{3 \times SD}{slope }$

$=\dfrac{3 \times 28.195}{1.75 \times 10^{9} \ M^{-1} }$

$\mathbf{= 4.833\times 10^{-8} \ M}$

The lower limit of quantification is:

$=\dfrac{10 \times SD}{slope }$

$=\dfrac{10 \times 28.195}{1.75 \times 10^{9} \ M^{-1} }$

$\mathbf{= 1.611 \times 10^{-7} \ M}$

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Pleas help me I'll give you brainliest Which of the following is equivalent to 4x² +6x/4x+2. A) xB) x+4 C) x-2/4x+2 D) x+1-2/2x+2​