Answer:
B) 18.
Step-by-step explanation:
Add them up then divide by the amount of numbers there are.
Answer:
Domain: All real numbers
Range: y≤3
Step-by-step explanation:
The given function is

This is a polynomial function.
The domain is set of all values of x, that makes this function defined.
Since polynomial functions are defined everywhere, the domain is all real numbers.
To find the range we put the function in vertex form:




The maximum value is 3
The function turns downward, hence the range is:

Let the second no. be x
-3x = 21 → x = 21/-3 → x = -7
Answer:
<h3>
x = 2</h3>
Step-by-step explanation:
use Pythagorean theorem:
a² + b² = c²
where a = x
b = 8/2 = 4
c = √20
plugin values into the formula:
x² + 4² = (√20)²
x² + 16 = 20
x² = 20 - 16
x = √4
x = 2

in log multiplication means addition
hence we add giving us

