Answer: 1
Step-by-step explanation:
16 * 1/2 = 8
7x + 1 = 8
7x = 7
x = 1
Answer: Yes it is a function.
Step-by-step explanation: When trying to find out, you put it into a calculator and can tell by the line if it is a function.
Step-by-step explanation:

6 2/3 = 20/3 = 60/9
4 4/9 = 40/9
60/9 - 40/9 = 20/9 = 2 2/9
Answer:Y=3x(x-4)
Step-by-step explanation: