Step-by-step explanation:
2 x (16 + (10 + 3) - 3) - 22
2 x (16 + 13 - 3) - 22
2 x 26 - 22
2 x 4
= 8
Answer:
D. The system is in echelon form.
Check attachment
Answer is 38
20 -(-3) + 15
20 + 3 + 15
38
10 miles per hour
speed= distance/time
30/3
=10
