Simplify the given expression. Assume x doesn’t = 0. (20x^-3/10x^-1)^-2
1 answer:
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Answer:
x =
Step-by-step explanation:
This question is from the topic subject of formula. It implies expressing x in terms of G, H y and J.
Given that: Gx + Hy = J
Subtract Hy from both sides to have;
Gx + Hy - Hy = J - Hy
⇒ Gx = J - Hy
Then divide both sides by G, so that we have;
x =
Therefore,
x =
Answer:
There is evidence to claim that the proportion of drug and alcohol use is higher locally than nationally.
Step-by-step explanation:
Given that a recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent.
Let p1 be the proportion of local seniors and p2 national seniors.
(right tailed test at 5% significance level)
Group I II
Success 69 60 129
Total 100 100 200
p 0.69 0.6 0.645
q 0.31 0.4 0.355
se 0.046249324 0.048989795 0.033836002
p diff 0.09
Std error 0.03384
Z 2.659574468 0
p 0.00391
we find that p value is 0.00391 <0.05
Hence we reject null hypothesis
There is evidence to claim that the proportion of drug and alcohol use is higher locally than nationally.