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4 years ago

X = -9 and y = 2 plz help me plz

Mathematics

1 answer:

olasank [31]4 years ago

5 0

Answer: 9 and -2

Step-by-step explanation: because of the way it's writen.

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F(x)=e*1/x<br>Calculate f'(x)

Murljashka [212]

Answer:

$\huge\boxed{f'(x)=-\dfrac{e^\frac{1}{x}}{x^2}}$

Step-by-step explanation:

$(e^x)'=e^x\\\\\bigg[f\bigg(g(x)\bigg)\bigg]'=f'\bigg(g(x)\bigg)\cdot g'(x)\\\\\left(\dfrac{1}{x}\right)'=-\dfrac{1}{x^2}\\\\====================$

$f(x)=e^\frac{1}{x}=\left(e^\frac{1}{x}\right)'\cdot\left(\dfrac{1}{x}\right)'=e^\frac{1}{x}\cdot\left(-\dfrac{1}{x^2}\right)=-\dfrac{e^\frac{1}{x}}{x^2}$

6 0

4 years ago

In ΔDEF, the measure of ∠F=90°, EF = 2.3 feet, and FD = 2.9 feet. Find the measure of ∠D to the nearest tenth of a degree.

Phoenix [80]

Answer:

$\theta=38.42 \textdegree$

Step-by-step explanation:

From the question we are told that:

Angle of F $\angle F=90 \textdegree$

Length of $EF = 2.3 feet,$

Length of $FD= 2.9 feet,$

Generally the equation for Angle D $\theta$ is mathematically given by

Since $\angle F=90$ .The triangle is a right angle Triangle

Therefore

$tan \theta=\frac{EF}{FD}$

$tan \theta=\frac{2.3}{2.9}$

$\theta=tan^{-1} 0.793$

$\theta=38.42 \textdegree$

8 0

3 years ago

Homework Help! FAST. Due in one day

saveliy_v [14]

Answer:

The total volume is 41.1 cubic meters.

Step-by-step explanation:

Volume of the platform is:

1.8m * 1.8m * 10m = 32.4 m^3

Volume of the ramp is half of a prism with same dimensions as that ramp:

0.5 * 6m * 1.8m * 1.8m = 9.7 m^3

Total: (32.4 + 9.7) m^3 = 41.1m^3

3 0

3 years ago

Consider the relationship between the number of bids an item on eBay received and the item's selling price. The following is a s

n200080 [17]

Answer:

Let's assume the following data:

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

$r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974$

So then the correlation coefficient would be r =0.974

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

Solution to the problem

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

Let's assume the following data

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

$r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974$

So then the correlation coefficient would be r =0.974

5 0

3 years ago

Help me with this please

Serggg [28]

Answer:

y=2x-3 your slope would be 2x

Step-by-step explanation:

you input the points into a graphing calculator then find you function of the line

5 0

3 years ago