Letter to a Friend Use this page to turn in the final draft of the letter you would write to your friend describing
the similarities and differences between the three trigonometric ratios: Sine, Cosine, and
Tangent. Remember, you must include details such as when the trig ratios can (and cannot) be
used, and why they are helpful when solving problems. Use specific examples of times you
could use Sine, Cosine, or Tangent to solve real-life problems. Your final draft must be in pen, or
typed, printed, and attached to this page. Put this in your Final Portfolio when you are done.

4if you add the absolute values together

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!