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3 years ago

Solve y = x2 +7 for x. O A. x= y-7 O B. X= tvy +7 O c. x=y+7 O D. X = +Vy-7

Mathematics

1 answer:

notsponge [240]3 years ago

5 0

Step-by-step explanation:

Given equation is

$y = x^{2} +7$

⇒ $x^{2} +7 =y$

⇒ $x^{2} =y -7$

square rooting both sides

⇒ $x = \sqrt{y-7}$

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Step-by-step explanation:

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Answer:

$H_0:\mu = 45$ and $H_a:\mu < 45$

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Step-by-step explanation:

Given

Random sample of 50 commuter times

Solving (a): The null and alternate hypothesis

From the question, a previous census shows that:

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This is the null hypothesis i.e.

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$T = \frac{45}{9.1/\sqrt{50}}$

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the t score is:

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<em>So, the null hypothesis is not rejected</em>

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