If Zia is 8 years younger than twice her sisters Sasha's age. This must be the expression.
2S = Z-8
<em>Where:</em>
Z is Zia's age
S is Sasha's age
Now we rearrange for Z:
Z = 2S + 8
Hope this helps!
Looks more like Trig than Algebra II
They want us to apply the sum angle formula to 
5π/6 is 150°; I find it easier to think in degrees.
When the tangent of x is 3/4 that's a right triangle with opposite 3, adjacent 4 so hypotenuse 5. So a sine of 3/5 and a cosine of 4/5, both positive because we're told x is in the first quadrant.
The sine sum angle formula is


We know sin 150° = sin 30° = 1/2 and cos 150° = - cos 30° = -√3/2


Third choice
Answer:
look it up
Step-by-step explanation: