Melody

ok some questions for you.

What is the wavelength?  (distance from crest to crest)

What is the amplitude?

What is the midline? 

If there was no dislacement the crest of  cosx  is on the y axis.  But it is moved a little bit in the negative direction.

So how far has it moved.  I means what is the x value of the crest?

Answer these questions and then I will help you finish it.

You are right  -   the first wave IS     y=sinx.

However

You need to look harder at the two graphs to see what is the same and what is different about them.

Fill in this table

For each graph, where is the y intercept in terms of the midline?

If they are vectors then you would just add the top and then add the bottom

If it is for combinatory maths then EP has answered.

Oh dear, your wavelengths are NOT right.

What should they be?

All your other answers apprear to be good :)

What is the difference between these 2 graphs

One is y = sinx and one isn't,  which is the sin x graph ?

what is the same about the 2 graphs?

What is the difference?

Just discuss them a bit.

I found 127 dont have a 2 which means that 1891 do have a 2.

Prob =  1891/ 2018

What is the units digit of the sum of the squares of the first 2007 odd, positive integers?

1^2=1

3^2=9

5^2=25

7^2=49

9^2=81

1+9+5+9+1 ..... 25

last digit of the sum of the squares of numbers lesss than 10 = 5

2000/10=200

200*5=1000

so

1+9+25 = 35

Thge last digit will be 5

I put the answer into Wolfram|Alpha and it says the answer is 2.

If

f(x) =x^9+1      is divided by   x-1   then the remainder will be f(1)

Sorry, I have had an error pointed out to me.

f(1)= 1^9+1 = 2

therefore the remainder will be TWO.

Just like you though.

Get the quotient using long division.  

Guest is right about the fractional part.

Are you the guest that has been putting garbage one liners all over the forum?

this is what i make of this description

\(Cos53^\circ=\frac{400}{swim}\\ swim=\frac{400}{cos53^\circ}=664.66 feet\\ 664.66feet*\frac{1min}{150feet}=4.43 minutes\)

The swim takes 4.43 minutes

There is too much informaton missing to answer the second question.

For example:

How fast is the river flowing?

Is he swimming upstream or downstream?

How fast can he run and what is the terrain like?

Which of the 2 possibilities is the camp?