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Since Tyler got 1/5 off his book, it means his books is only 4/5 of the original price.

21.67 * 4/5 = 17.336

so he's only paying $17.34

To fing chicken, one must first BE the chicken

Yo DO know this website has a calculator built in , right?????

sqrt(705) = 26.5518360947035073

1 Meter = 39.37 inches

(8.7m x 39.37 inches/m )/12 inches/ft =28.5 ft

619369

sin θ   = O / H   ......so......

sin 43  = 7.31 / H      rearrange as

H =  [ 7.31 / sin 43 ]  ≈ 10.7185

15

114181.583333

I looked around, did a little research and found 'x'  right between 'w' and 'y'....    LOL

Thank you! By the way, amazing solution!

y-4=1+7y     subtract 1 from both sides of the equation

y-5 = 7y        subtract 'y' from both sides

-5 = 6y          divide by 6

-5/6 = y

Just use the web2.0 calc to get  an answer !

sqrt(3, 3 = 1.4422495703074084

If you enter the '2nd' key first (upper left corner of web2.0 calc)  tha tan key becomes its 2nd function  'atan'    which is short for arctan   which is the same as tan^-1 (tangent inverse)

ONE example comes quickly to mind      tan(0) = 0     but it does not have any 1's

Coterminal angles are basically the angles with the same sides, but differ by a full circle (2 pi or 360 degrees) 

Just add 2pi   and 4 pi to get two coterminal angles

Did you mean pi/7 ?   then    15 pi/7    29 pi/7

Did you reall mean pi 7 ?     You can subtract 2 pi and 4 pi to get    5 pi   3 pi  as coterminal angles

Thats fun to say.

That is true....when multiplying fractions  multiply the numerators for the new numerator and multiply the denominators for the new denominator

7/9 x 3/4 =  (7x3) / (9x4) = 21/36     simplify to 7/12

Let's pick a square with side lengths of 100    perimeter = 400

    area = 100x 100 = 10, 000

  then the rectangle will have side lengths     of 88.88888 and 111.11111     Perimeter = 400

     area = 88.88888... x 111.11111...= 9876.54321

ratio of rectangle to square areas   =    9876.45321/10000 = ~ 80/81

No.Logarithms do not matter here. Decimal expansion is just normal writing, such as 10 for ten or 3.1415926... for π 

Since Tyler got 1/5 off, it means he's only paying 4/5 of the original price.

12.95 * 4/5 = $10.36

So... logarithms? 

Decimal expansion: base 10 writing of a number, the usual way in which we write a number.

Could you explain decimal expansion? l'm not familiar with the term.

Try consulting him about it. I'm sure he has valid reasons. Not like there's anything wrong. :/

y^2-16y+64 = -9+64

(y - 8)^2  =  55       sq rt  both sides

 y - 8   =  ± √55     add 8 to both sides

 y  =  ± √55   + 8