Answer:
1.90
Step-by-step explanation:
You would want to use a calculator since you need decimal places.
Once you type it into the calculator you should get 1.8952380952.
Since you're trying to simplify to the second decimal place, look at the third number after the decimal.
The 5 rounds up the 9 to a ten, which is represented by the 0.
That then turns the 8 into a nine.
Recall that
![\sin^2x=\dfrac{1-\cos2x}2](https://tex.z-dn.net/?f=%5Csin%5E2x%3D%5Cdfrac%7B1-%5Ccos2x%7D2)
.
If you know the Maclaurin series for
![\cos x](https://tex.z-dn.net/?f=%5Ccos%20x)
, finding this expansion should be easy.
X + y = -36
x * y = 160
x = -36 - y
(-36-y) * y = 160
-36y - y^2 = 160
y^2 + 36y + 160 = 0
y = -5.19 and x = -30.8
or
y = -30.8 and x = -5.19
You can write them in this form too
x+ysqrt(z)
Answer= 2w2-9w-5
Hope this helps
About 16 copies cost the same amounts