Answer:
C: is a function because each input (x) has exactly one output( y).
Step-by-step explanation:
A function is when one input (x) has exactly one output (y).
A: is not a function because -4 is paired with two different y values.
B: is not a function because -4 is paired with two different y values.
C: is a function because each input (x) has exactly one output( y).
D: is not a function because -1 is paired with two different y values.
Answer:

Step-by-step explanation:
Given inequality:

In order to represent the solution on the number line, we will first solve the given inequality.
We have

Subtracting both sides by 4.


Dividing both sides by -3.
[On dividing both sides by a negative number the sign of the inequality reverses.]

So, solution of this inequality will range from -3 to -∞
The number line is represented below.
Answer:
YES
Step-by-step explanation:
For a triangle of sides a, b, c, we must have the following to be true to have a triangle.
a + b > c > |a - b|
b + c > a > |b - c|
a + c > b > |a - c|
if a=8, b=7, and c=9, we have that:
8 + 7 > 9 > 8 - 7, 15 > 9 > 1. TRUE.
7 + 9 > 8 > 9 - 7, 16 > 8 > 2. TRUE.
8 + 9 > 7 > 9 - 8, 17 > 7 > 1. TRUE.
Thus, a triangle can have sides of 8 cm, 7 cm, 9 cm.
Answer:
X = 6
Step-by-step explanation:
Add 14 to both sides: 18 = 3a
Divide both sides by 3: a = 6