Answer:
Step-by-step explanation:
Hello,
Question 15
We can search x such that:

There is 1 solution.
Question 16
Again, we search x such that:
There are two solutions.
Hope this helps.
Do not hesitate if you need further explanation.
Thank you
You can check your answer by multiplying 3 with 4 <span>and then add 6 to the product. Then your result will be 18.</span>
1. √16 = 4
2. √2.25 = 1.5
3. 6^2 / 9 *2 = 8
4. 12-2 / 6+4 = 1
5. √16+9 = 5
6. 63 / 3^2 + |2| = 9
The x is horizontal on a graph and then the y axis is vertical on a graph.