Describe and tell why it is important to know how to add and subtract decimals when it comes to your life.

Reality.

Step-by-step explanation:

It is important because when you go to the store and you buy something you will need to know how much money you need to give that is why you need decimals. What if your try to tell them that coffee costs $1.50 and you don't use decimals and you write 150? that is why you need decimals.

54

step-by-step explanation:

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0