Answer:
option C is a the right answer ...
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Answer:

Step-by-step explanation:
You can use the foil technique (first outer inner last)
(3x - 1)(-x + 4) = (3x · (-x)) + (3x · 4) + ((-1) · (-x)) + ((-1) · 4)
= 
= 
Answer:
.88
Step-by-step explanation:

The standard deviation is the square root of the variance.
Answer: -14
Step-by-step explanation:
Answer: 2:3 and 12:18
Step-by-step explanation: Find the multiples of 6 and 9