Answer:
a=2.4
b=13.9
c= -8.1
Step-by-step explanation:
a= 3-0.6= 2.4
b= 12.5-(-1.4)= 13.9
c= -5.2-2.9= -8.1
Answer:
Step-by-step explanation:
George Washington was the first president of USA.
I believe it would be B observational sampling

Because there's one 3 & four 7's .

Because there are two 2's & four 9's