Algebra/Trig Competition Ahmed VS Lev

Yeah, but I told you, it's because they have very limited space...so they moved on to looking at accusatives...it's stupid...yes...try influencing someone to drop it, then take him to your guidance and make the switch ...or just speak with her I guess...

And I don't think so...my accumulative is 94 (since freshman year till now). What's yours?
==========================
Is this even, odd or neither:

f(x)=x^3+cosx

f(x)=x^3+cosx

f(-x)= (-x)^3 + cos -x
f(-x) = -x^3 + cosx

-f(x)= -x^3-cosx

since -f(x)=/= f(-x)and f(x)=/= f(-x)
It is neither

Very good. Your turn

solve the system

x+y=4
x^2+xy+y^2=13

Ahmed give up?

No...ill work on it after I eat

have fun

x+y=4
x^2+xy+y^2=13

y=4-x

x^2+x(4-x)+(4-x)^2=13
x^2-4x+3=0
(x-1)(x-3)=0
x=1
x=3

(1,3) and (3,1)

Good?

Yes good. your turn.

Ahmed:3
Lev:3

The angle of elevation of the top of a tower is 47° from a point D south of it.
The angle of elevation of the top of the tower is 36° from a point E east of it.Find the height of the tower if the distance of DE is 70m.

Ahmed IV wrote:
The angle of elevation of the top of a tower is 47° from a point D south of it.

You said 47° from a point D do you mean 47° from point D

Basically can you reword this question.

Yes Lev

Ok so let me re-write your problem and tell me if its right.

The angle of elevation of the top of a tower is 47° from point D south of it. (South meaning the floor right?)
The angle of elevation of the top of the tower is 36° from point E east of it. (meaning to the right or left right?)
Find the height of the tower if the distance of DE is 70m.

Yes

Here's a picture for it:

Code:

            ------P-----
                  o
                *|  *
                * |    *
              *  |        *
              *  |h          *
            *    |              *
            *    |                *
          *      |        x      36° *
          *      o  *  *  *  *  *  o E
        *47°  *  Q              *
        *  * y        *  70
      * *    *
    D o

This it?
https://i.servimg.com/u/f61/15/21/39/25/untitl11.jpg

Yes

in other words we got a triangle right? Not a trapezoid right?

in other words we got a triangle right? Not a trapezoid right?

Yes

is it 30.314

No Lev

What is it?

28.04503214

How?