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christib
02.03.2020 •
Mathematics
HELP ASAP plz, 45 pts
A classmate simplified a rational expression below
a) explain the error in this simplification
b) show your work as you correct the error
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Ответ:
She didn't take the LCM, made an error while cross multiplying
x = -6
Step-by-step explanation:
a)she didn't take the LCM before cross multiplying.
Also, didn't cross multiply correctly
b) 1 -2/(x-2) = (x+1)/(x+2)
1 - 2/(x-2) = (x+2-1)/(x+2)
1 - 2/(x-2) = 1 - 1/(x+2)
1 - 2/(x-2) = 1 - 1/(x+2)
-2(x+2) = -1(x-2)
-2x-4 = -x+2
x = -6
Ответ:
twice as long is 4 hours so divide 24 by 4 and you get 6