Can some one plzz help

Answers

Answer 1

Answer:
This is an unusual way of presenting a set of data.   Usually, when they ask for the mean, it's the mean of a bunch of numbers. In this problem, it's the mean of some property of a bunch of points.

Look at the points on the graph.
There are ten points:

There are 2 points where Variable A is 1.
There are 2 points where Variable A is 2.
There is 1 point where Variable A is 3.
There is 1 point where Variable A is 4.
There are no points where Variable A is 5.
There is 1 point where Variable A is 6.
There is 1 point where Variable A is 7.
There is 1 point where Variable A is 8.
There are no points where Variable A is 9.
and
There is 1 point where Variable A is 10.

So there you have the ten numbers for Variable A :

   1, 1, 2, 2, 3, 4, 6, 7, 8, 10.

To find their mean:

   Addum up:      44

   Divide the sum by 10: 4.4

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What is the area of a rectangle with the height of 25mm, and the length of 12mm? After you get the product, turn it into feet.

Answers

Area = (length) x (width) = (25mm x 12mm) = 300 square millimeters

You can't convert 'square millimeters' to feet. One is a unit of area,
but the other is a unit of length.

You can convert square millimeters to square feet, though.

(300 mm²) x (1 ft / 304.8 mm)² = 0.00323 square foot (rounded)

300 feet is the answer

What is the amount of sales tax on a $48 backpack if the sales tax rate is 6%?

Answers

Answer: 2.88

Step-by-step explanation:

48 x 0.06 = 2.88 and thats how much tax you will pay!!

Verify 2+2cot^2x=2cotxsecxcscx

Answers

$2+2\cot^2x=2\cot x\sec x\csc x\n\nL=2(1+\cot^2x)=2\left(1+(\cos^2x)/(\sin^2x)\right)=2\left((\sin^2x)/(\sin^2x)+(\cos^2x)/(\sin^2x)\right)\n\n=2\left((\sin^2x+\cos^2x)/(\sin^2x)\right)=2\left((1)/(\sin^2x)\right)=(2)/(\sin^2x)\n\nR=2\left((\cos x)/(\sin x)\right)\left((1)/(\cos x)\right)\left((1)/(\sin x)\right)=2\left((1)/(\sin x)\right)\left((1)/(1)\right)\left((1)/(\sin x)\right)\n\n=2\left((1)/(\sin^2x)\right)=(2)/(\sin^2x)$