Answer:
and
.
Step-by-step explanation:
The equation can be simplified with the help of trigonometric identities:

Which means that equation is equal to zero if any component of the product is zero. The solutions of the expression are:
a) 

b) 



Any value different of both subsets do not satisfy the equation described above.
Answer:
3 – x
Step-by-step explanation:
A number in this case we will as x. And 3 less than x is -
3 – x
Answer: A. 87 feet
Step-by-step explanation:
1. You can find the t value of the vertex of the parabola as following:

2. Substitute values:
a=-16
b=70
Then:

3. Substitute the vaue obtained into the equation given in the problem. Therefore, you obtain the following result:

4. To the nearest foot:
h=87 feet
Answer:
Step-by-step explanation:
The answer is C it is the amount of money divided equally between each student