Answer: Lisa has 23 Pablo has 18 and Chau has 182
Step-by-step explanation: if you multiply 91 times 2 you get 182 for Chau, next if you take 5 and divide it by 90 you get 18 for Pablo lastly if you take 18 and add it by 5 you get 23 for Lisa
Answer:
30
Step-by-step explanation:
the formula is a^2+b^2=c^2
18^2+24^2=c^2
900=c^2
c=30
Answer: 30 couples.
Justification:
You can follow a systematic approach to tackle this kind of problems.
Construct a chain of ratios whose units cancel out to yield to a result with the right units of the answer you are looking for.
In this case you want to know the number of couples that took the ride in 30 minutes.
The input data are:
1 couple / seat
1 seat / minute
Then, by multiplying those two data you get: [1 couple / seat] * [1 seat / minute], which, treating the units appropiately yields to 1 couple / minute.
Next, you realize that when you muliply 1 couple / minute times the number of minutes you get the number of couples that took the ride in that time.
So, the answer is: 1 couple / minute * 30 minute = 30 couples (the minutes cancel out because they appear in the denominator and numerator).
So, when you work with ratios and proportions, the use of units helps you a lot to figure out the way to get the answer.
It reflected across line x = 3, y coordinate will remain the same.
Answer: (7, 5)
