Answer: 25 hours
Step-by-step explanation:
Let r = rate, t = time
From 1st sentence,
5r x 12 = 3
60r = 3
r = 3/60 = 1/20
From the next,
4r x t = 5
4 x 1/20 x t = 5
4/20t = 5 = 25
Answer:
3x - y = 20
Step-by-step explanation:
First, distribute the 3 among everything within the parentheses to get
y + 2 = 3x - 18.
Next, add 18 on both sides to get
y + 20 = 3x.
Now subtract y on both sides in order to move it.
Your answer is now: 20 = 3x - y, or
3x - y = 20.
Hope this helps :)
Answer:
(-5,5) and (5,5)
Step-by-step explanation:
No solution.
...................
Answer:
0.20 = 1/5 or 20%
0.30 = 3/10 or 30%