D is the answer of your question
1/12 because first u find a common denominator of 12 then you get 9/12 + (-8/12) and then since one is negative and one is positive you have to subtract and you get positive 1/12
Answer:
pic one is rock cycle, pic 2 crystaline structure, and pic three and 4 are the same pictures as question 2
Step-by-step explanation:
Answer:
Event A - 1/3
Event B - 4/9
Step-by-step explanation:
Add them together 3+4+2= 9
then put them in to fractions...