Answer:
4k^3 - k^2 - 2k
Step-by-step explanation:
-k * -4k^2 = 4k^3
-k * k = -k^2
-k * 2 = -2k
4k^3 - k^2 - 2k
Answer:
2. tan 280°
3. -tan 80°
Step-by-step explanation:
Your calculator can help you figure this out.
__
The tangent function is periodic with a period of 180°, so tan(100°) will be equal to tan(100°+k·180°) for any integer k. Answer choices include k values of ±1, so two of them are correct:
- tan(100°) = tan(100° -180°) = tan(-80°)
- tan(100°) = tan(100° +180°) = tan(280°)
From the picture you can see that TY bisects angle T.
Use the bisector property:
.
If YK=68 mm and VK=x mm, then VY=x-68 mm.
Then 
.
Express x-68:
mm.
Therefore, x=30+68=98 mm.
Answer: x=98 mm.
