Answer:
a = 5
Step-by-step explanation:
Using Pythagoras' theorem in the right triangle
a² + 12² = 13²
a² + 144 = 169 ( subtract 144 from both sides )
a² = 25 ( take the square root of both sides )
a =
= 5
Explanation:
For every problem, plug in the number where the variable is.
For example:
Evaluate the following expression by substituting 8 for x.
x + 9
You would take the x and turn it into 8, then you would do 8 + 9.
Answer:
-8
Step-by-step explanation:
We can rewrite as - (1+7) = -8.
It will affect her paycheck by it going up and she gets more money
Answer:
5) 
6)
Step-by-step explanation: