PLEASE HELP ME If Machine A makes a yo-yo every five minutes and Machine B takes ten minutes. How many hours would it take them to make 20yo−yos?

It would take 2 hours working together to make 20 yo-yos

Step-by-step explanation:

ratio is 2/1 so if you write 14 5 minutes and 7 one minutes you will get 21 yo-yos, if you count up the time for the 20 you get 2 hours

4 puzzles in 3 hours

step-by-step explanation:

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: