If 3 pounds of apples cost $0.90, how much will 10 pounds cost?
$3.00
You find that your watch gains 2 minutes in 6 hours. How much will it gain in 3 days?
24 minutes
Both are right.
How would I solve the second problem with proportions? I tried to do it with proportions but I couldn't get the answer so I just solved it another way.
I'd start with the number of hours in 3 days. 24 * 3 = 72
2/6 = x/72
Oh I see how to solve it now. That's what I needed. Thanks! :D
You're welcome. :-)
To solve the first problem, we can set up a proportion. Since 3 pounds of apples cost $0.90, we can write the proportion as:
3 pounds / $0.90 = 10 pounds / x
To find x, we cross multiply:
3 pounds * x = $0.90 * 10 pounds
3x = $9.00
Divide both sides by 3 to solve for x:
x = $9.00 / 3
x = $3.00
Therefore, 10 pounds of apples will cost $3.00.
For the second problem, we are given that the watch gains 2 minutes in 6 hours. We need to find out how much it will gain in 3 days.
First, we need to convert 3 days into hours. Since there are 24 hours in a day, we have:
3 days * 24 hours/day = 72 hours
Now that we have the number of hours, we can set up a proportion:
2 minutes / 6 hours = ? minutes / 72 hours
Cross multiply to find the unknown minutes:
2 minutes * 72 hours = 6 hours * ? minutes
144 minutes = 6 hours * ? minutes
Divide both sides by 6 hours to solve for the unknown minutes:
144 minutes / 6 hours = ? minutes
24 minutes = ? minutes
Therefore, the watch will gain 24 minutes in 3 days.