2, 67, and 83 are all prime. 63 and 91 are composite. For the bottom question the answer is A and B.
Answer:
For number 9)
Interval notation ![(-\infty,3]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C3%5D)
For number 10)
Interval notation:
.
Step-by-step explanation:
On square roots you have to make sure the inside is positive or zero.
So the domain of the first one will come from solving

Subtract 6 on both sides:

Divide both sides by -2 (flip inequality when divide both sides by negative):

The domain is less than or equal to 3.
Interval notation ![(-\infty,3]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C3%5D)
On fractions you have to watch out for dividing by 0.
The domain is all real numbers except when 4x+2=0.
4x+2=0
Subtract 2 on both sides:
4x=-2
Divide both sides by 4:
x=-2/4
Reduce:
x=-1/2
The domain is all real numbers except when x=-1/2
Interval notation:
.
Answer: I think its B not a 100% sure though
Step-by-step explanation:
Answer:

Step-by-step explanation:
So say there are x yellow cubes.
Yellow = x
Blue = 3x
Green = 15x
It doesn't say red so I'm going to assume there are none.

Answer: =2
Step-by-step explanation
:Solve the rational equation by combining expressions and isolating the variable
n
.
n
=
2