Answer:
r
=
1
Step-by-step explanation:
<h3>
System of equations.</h3>

Put (1) to (2):

Substitute the value of x to (1):

Solution:

The answer is 3n because the 3 is the coefficient
Answer:
x> -1
Step-by-step explanation:
Open circle means > or <
Answer:
it covered 54 and ran 6 per 9 second
Step-by-step explanation:
step 1. 78-24 = 54
step 2. 54/9 = 6