Answer: 1/25 or 0.04
Step-by-step explanation:
1/5 divided by 5 for the whole number you have to turn it to a fraction so you would do 5/1
THEN: it becomes 1/5 divided by 5/1 but you have to do the inverse so the inverse of division is multiplying and you will cross multiply so 5*5= 25 and 1*1=1 therefor the final answer is 1/25
X = k x y
21 = k x 3
k = 7
x = 7y
x = 7(10)
x = 70
1.

which is further simplified to

which is 20.
2.
Answer:
1,890 feet
Step-by-step explanation:
2 inches=30 feet
4.2 inches= 63 feet
63ft x 30 ft= 1,890ft
The ratio is 500:1 if you are looking for that
Hope I helped
And if I can, Can I get brainliest