A.
If you multiply the original equation by 3 you get -45x+3y=54, which is the exact same as A, therefore they have infinite solutions.
Answer:
5 minutes
Step-by-step explanation:
To get the response to this question, it would be required to convert both times to seconds alone.
For the first, the time It takes to flash is 1 minute 15 seconds which is same as 75 seconds
For the second, it takes 1 minute 40 seconds which is same as 100 seconds.
Now to get the time they would flash together, we need to know their lowest common multiples. The values involved are 75 and 100. Thus, the lowest common multiple of both is 300.
This is equivalent to 300 seconds which is 5 minutes time
A seven is a prime number because you can't divide it. 33 is a composite number because three can go into 33.
If the number after the decimal is 1-4 you drop it, if it's 5-9 you add one to the whole number. In 19.6, 6 is 5-9 so you add one to 19- 19.6=20. In 23.8, 8 is 5-9 so add one to 23- 23.8=24. In 38.4, 4 is 1-4 so you drop it- 38.4=38. So the answer is C. 20, 24, 38 :) hope this helps
