Systematic Random Sample, Stratified Random Sample, and Simple Random Sample.
You do what is asked for in the parentheses then multiply by the number outside of them.
Answer:
-2a +11b
Step-by-step explanation:
3(a+2b) - 5(a-b)
we apply distributive property:
3*a + 3*2b - 5*a + 5*b
3a+ 6b -5a +5b
-2a +11b
B
It’s the only answer that begins with a positive number