To find the probability that the mom is at the front of the line:

Therefore the answer is 1/5.
Hope it helps!
Answer:
to estimate the result of multiplication (product), round the numbers to some close numbers that you can easily multiply mentally. One method of estimation is to round all factors to the biggest digit (place value) they have.
Step-by-step explanation:
Answer:
you need to be more specific like which ones are x or y
Step-by-step explanation:
ask it again or comment the specifics
Answer:
4(a+b)
Step-by-step explanation: