let's recall the vertical line test, if a vertical line hits the graph or points twice, then is NOT a function. Check the picture below.
Answer:
C. x=13
Step-by-step explanation:
add the 13 to the -4 and you will get your 9
Answer:
Option B and D
Step-by-step explanation:
Multiply 80 by 1/10
Divide 80 by 10
<h2>
Hello!</h2>
The answer is:
The correct option is:
C) 
<h2>
Why?</h2>
To solve the problem, we need to remember the product of powers with the same base property, the property is defined by the following relation:

If we are multiplying two or more powers with the same base, we must keep the base and add/subtract the exponents.
So, we are given the expression:

We can see that both powers have the same base (4), so solving we have:

Hence, we have that the correct option is:
C) 
Have a nice day!