rockinrachel9099
20.08.2019 •
Mathematics
Simplify the expression: (x + 3)(2x - 1)
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Ответ:
(x+3) (2x-1)
So first, you want to combine the x's. To do this, count the x in (x+3) as 1. So the x's combined are equal to 3x. Now, combine the 3 and -1. This expression simplified is equal to [ (3x+2) ]
Ответ:
and get x+3×2x-1
then add like terms
and get
3x+2.
that's your answer.
3x+2
Ответ:
47.25 mph
Step-by-step explanation:
Represent the total distance traveled as 2x. Average speed= total distance/total time
When going at 42 mph, the time would be x/42 and when going at 54 mph the time would be x/54 to travel x distance. Add x/42 and x/54 together to get 16x/378. Then divide 2x by 16x/378 to get 47.25 mph. Also this is RSM innit?