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90/40 x100% = .......

Would the answer be 

4√3−√2

______

     4 

The sum of the angles of a triangle sum to 180 degrees

27  +  96  +  x  = 180       solve for 'x'  the third angle

16% of $ 2365  equals what ?

16% / 100%  x $ 2365   = $...........

Use dimensional analysis:

338 miles / ( 65 miles/hr) =   ........  hr         See how the miles dimension 'cancels out' and you are left with what you are seeking: Hours

10 square root 3       yes

ohhh okay , so it would the be 10square 3?

Case 1: Superball

The probability is 1/10, because you choose 1 out of 10.

Case 2: 2 whites

The probability is 1/C(10,2) = 1/45, because you choose 2 out of 10.

Case 3: 3 whites

The probability is 1/C(10,3) = 1/120, because you choose 3 out of 10.

Adding these, you get 1/10 + 1/45 + 1/120 = 47/360.

(sqrt 29) / 5

Would the sqr only be on the 29 or for both 29/5

s = student tix

6s + 27s − 45 = 1,374.     solve for s

33s - 45 = 1374                add 45 to both sides of the equation

33s = 1419                       divide both sides by 33

s = 43         number of student tix

Thanks EP,

continuing

\(sin 60 = \frac{15}{hypotenuse}\\ \frac{sin 60}{1} = \frac{15}{hypotenuse}\\ \text{turn both sides upside down}\\ \frac{1}{sin 60} = \frac{hypotenuse}{15}\\ \text{mult both sides by 15}\\ \frac{1*15}{sin 60} =hypotenuse\\ hypotenuse=\frac{15}{sin60} \)

\(2L + 2(L − 2.5) = 56\)

\(2L+2L-5=56\)

\(4L=64\)

\(L=16\)

sec = 1/cos

10, -4           use pythagorean theorem to find the hypotenuse     10^2 +(-4)^2 = h^2     h = sqrt 116

cos  =   adj/hyp = 10 / sqrt 116

sec = 1/cos =   sqrt 116/10   = 2sqrt29/10 = sqrt 29 / 5

OKay. Let's get started.

we will make a system of equations.

s for students.

\(6s + 27s − 45 = 1,374\)

\(27s+6s=1374+45\)-- add 45 to both sides.

\(33s=1419\)-- combine like-terms.

\(s=43\)

Tan = sin/cos

Substitute in known values:

sqrt3/2  / 1/2     +   1/2      *        (-sqrt2/2)   =     ......   answer  

x = soup cans      sodium = 500x

x+2 = dinners       sodium = 700(x+2)     summed = 7400

500x + 700(x+2)   = 7400      solve for x = #cans of soup    then   dinners = x+2

5.98 x 10^24 kg =  5.98 x 10^27 gm

Diameter = 12700 km    radius = 6350 x 10^5 cm

VOLUME of sphere =  4/3  pi  r^3

5.98 x 10^27 gm / (  4/3 pi (6350 x 10^5 cm)^3  )  = answer

Note: This question was seen before and you missed some crucial info in it, which I have amended.

Norachai traveled to the recycling plant and back. The trip to the plant took 4 hours and the trip back took 5 hours. He averaged 9mph faster on the trip there than on the return trip. What was norachai average speed on the outbound trip?

Let his return trip speed = S
5S = 4(S + 9)
5S =4S + 36
S = 36 mph - his speed on his return
36 + 9 =45 mph - his speed to the plant
5  x  36 =180 miles - distance to the plant
2 *180 / [5+4] =40 mph - his average speed to the plant and back. 

Im sorry I didnt see your previous answer 

do  i do 50 divided by 16 ? so it would 0.25 ?

Perimeter -  two sides = remaining two sides

54 - 18-18= 18.    This is two sides, so ONE side is 9

so the rectangle is 9 x 18.       Now You SHOULD be able to calculate the area....

y=-cos(8x)

This is how I would go about understanding and building this equation.

I would always do a rough graph whether I was asked to or not.

y=cosx    looks like this     you must memorize this

But mine has a cos(8x)......

y=cos(8x)

but     my wavelength is     2pi/8      so the middle must be  pi/8

mmm so now I have  so the 2pi on the x axis must be replaced with  2pi/8,    and the middle will be half that, pi/8

I sketch that.

then it is multiplied by -1 so I turn it upside down.

Here I have built it.

The black one is the finished one

Mmm, it would be so much easier if you were in front of me. It would be much easier to explain.

Maybe I might half give up on that approach.

--------------------

Graph this.  Do not use desmos except at the very end to check

y=3sin4x - 2

midline=?    draw it with a dotted line.

what is the y value for the highest point, put a light line across to indicate the top.

what is the y value for the lowest point, put a light line across to indicate the bottom.

Will the y intercept be in the middle or at the top or bottom?  put it in.  

What is the wavelength?   

Divide the wavelength by 4 and put the 4 points on the x axis. (so you will have 1 whole wavelength.)

Now graph it, or at least try to. See how you go.  

Lol 

Hi AnimalMaster welcome to the forum.  

I like to give helpful, incomplete answers. 

I want this forum to be a learning site, not a cheat site.

If the asker posts a backup question asking for more help, and I do not answer fairly promptly, then your response may be welcomed but otherwise please do not answer over me.

I do not want you to feel down about me saying this. I know you have been answering lots of questions and I am really pleased that you have.  Other people often may not feel the same. If I give a full answer then it is fair game for you and others to put your versions afterwards (or before) but if I do not finish, there is usually an obvious reason for this.