Answer:
x = 1.53, -1.53.
Step-by-step explanation:
9x^2 - 21 = 0
9x^2 = 21
x^2 = 21/9
x = +/- √21 / 3
x = 1.53, -1.53.
There are 116,280 ways to select the officers.
Since order is important, we use permutations:
Answer:
26°
Step-by-step explanation:
If one side of a triangle is a diameter of a circle, then the angle that is not directly connected to the diameter is 90°.
This means the answer is 90 - 64 or 26.