3 years ago

3x+15y=7. Solve for Y

Mathematics

2 answers:

AleksAgata [21]3 years ago

5 0

Your answer is Y= -x\5+7\15

hram777 [196]3 years ago

5 0

Y= -x/5 + 7/15 is the answer when sloving for y

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KATRIN_1 [288]

Answer:

Lower limit = 0.76

Upper limit = 0.84

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 350

Number of drivers that buckle = 280

Formula:

$p' = \dfrac{x}{n} = \dfrac{280}{350} = 0.8$

$q' = 1-p' = 1 - 0.8 = 0.2$

The standard deviation for sp =

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$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

Putting the values, we get,

$0.8 \pm 1.96(0.02138)\\= 0.8 \pm 0.0419048\\=(0.7580952, 0.8419048)\\\approx (0.76,0.84)$

Lower limit = 0.76

Upper limit = 0.84

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Step-by-step explanation:

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