X3 + 3x? – 10x = 0.
1 answer:
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Answer:
x = 9
Step-by-step explanation:
3(3x + 5) = 96
Divide both sides by 3.
3x + 5=
Divide 96 by 3 to get 32.
3x + 5= 32
Subtract 5 from both sides.
3x = 32 − 5
Subtract 5 from 32 to get 27.
3x = 27
Divide both sides by 3.
Divide 27 by 3 to get 9.
Hope it helps and have a great day! =)
Answer:
456
Step-by-step explanation:
Let X be the SATscore scored by the students
Given that X is normal (1000,200)
By converting into standard normal variate we can say that
is N(0,1)
To find the top 10% we consider the 90th percentile for z score
Z 90th percentile = 1.28
i.e. only students who scored 456 or above only should be considered.