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What is wrong with: 2 x 3 x 5 x 7=210 ??!!

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tan(x/2)=(8/5)/(-4/5)

tan(x/2)=(8/5)(-5/4)

tan(x/2)=-2

Did I do the right evaluation? 

So, wouldn't that make the answer -2?

That is what I gave you.....calculate it out......

Yes....of the 4 options it is the 1st and 3rd.

Here is a webpage .......look at   Hal Angle formulas and see what you find.

http://home.windstream.net/okrebs/page103.html

Remember   Sin and COs are both negative in Quadrant III

sin = -4/5                                     cos = - 3/5     (because cos^2 = 1- sin^2)

Then go from there ......

The answer is supposed to be $ 232.02.

\(a^{9a}=(9a)^a\\ a^9=9a\\ a^8 = 9\\ a = 9^{1/8} = 3^{1/4} = \sqrt[4]{3}\\ 4+3=7\)

So, is it the first and third option?

cos(2x) = cos^2(x) - sin^2(x) = 2 cos^2(x) - 1 = 1 - 2 sin^2(x)        No math guniousity used...I just looked it up.  

Dannymay  is just using this site as a cheat site.

Yes it is a prism :)

Your username is like your suitcase, it has all your stuff inside.

You can change the lock, you can even buy a new bag, but you can't reshape the original one and magically turn it into a different suitcase.  Your username is fixed.

Thank you for your help, keep doing what you're doing.  :-)

8437 x .055 x 1/2 =    ......    .055 is 5 and 1/2 % in decimal form and the 1/2 is becuase it is only 6 months or 1/2 year

I think it is a prism. The answer choices are:

A.) prism

B.) net

C.) surface area

D.) face

This is the SUM of all of the figure's parts

    there are two triangles 6 x 8    area of triangle = 1/2 x 6 x 8    x 2      (the 2 is becuse there are 2 triangles)

    there are two long rectangles  ONE is area = 10 x 4   and ONE is 8 x 4

      and finally the end rectangle is area  6 x 4

Add all of the red areas to get the total surface area.......  

16.4 ft - 14.2 ft   = 2.2 ft greater than the mean .....

This is   2.2 / 2.1 = 1.0476 Standar deviations above the mean   

Look at 1.04  (rounded to 1.0 ) in the chart to find that .8413 fraction of sunflowers are LESS than that 16.4 ft    the rest are taller

     1-.8413 = .1587  is the fraction that are TALLER than 16.4 ft      .1587   is equal to 15.87%

Find the side length of the cube using Pythagorean Theorem

x^2 + x^2 = 1^2     

2 x^2 = 1

x^2 = 1/2

x = (sqrt2) / 2

Surface area = s x s x 6      (six sides )     sqrt2 /2 x sqrt2 /2 x 6 = 3 sq units

Second one:  If you draw a line from A to H   you will hav a triangle with all three side lengths equal....and equilateral triangle.....all of the angles in a equilateral triangle are   60 degrees

They vary directly so     y = kx        (if they varied INdirectly it would be   y = k/x)

y = kx     divide both sides by x

y/x = k    Now sub in the values given to find k

16/4 = k = 4

Second part:    y = kx        y = 4x        y = 4(7) = 28 when x = 7

From -1   to 1 is a 'distance ' of 2

at -1 value is 3

at 1  value is 27    for a change of 24 over a distance of 2   =  24/2 = 12 avg rate of change per unit

Maybe......but he has posted a lot of statistics problems over the last week or so......He should have an IDEA of how to proceed after seeing the other postings......      We are not here to just do someone's homework....ya need to at least try to answer your own questions and then ask for help  

 about 700 pounds