Answer:
r = 20
Step-by-step explanation:
-4 = r/20 - 5
-4 + 5 = r/20 - 5 + 5
1 = r/20
1 * 20 = r/20 * 20
r = 20
Answer:
Step-by-step explanation:

Answer:
$27.75
Step-by-step explanation:
Multiply $2.25 by 11 to get the answer
1.679 kg * (40 min)/(kg) + 20 min = 67.16 min + 20 min = 87.16 min