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3 years ago

Evaluate the expression for x = -2, y = 3, and a = -4 5x-6y-3a

Mathematics

2 answers:

Veseljchak [2.6K]3 years ago

6 0

Answer:its ez you just say teacher im sick

Step-by-step explanation:

do it right ok?

Inga [223]3 years ago

6 0

Hey there!

5x - 6y - 3a

= 5(-2) - 6(3) - 3(-4)

= -10 - 18 - 12

= -28 - (-12)

= -28 + 12

= -16

Therefore, your answer is: -16

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

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3 years ago

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3 years ago

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(a) 0.2061

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Step-by-step explanation:

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(a)

Compute the probability that the sample mean is greater than 63 inches as follows:

$P(\bar X>63)=P(\frac{\bar X-\mu}{\sigma/\sqrt{n}}>\frac{63-64}{3/\sqrt{6}})\\\\=P(Z>-0.82)\\\\=P(Z$

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(b)

Compute the probability that a randomly selected woman is taller than 66 inches as follows:

$P(X>66)=P(\frac{X-\mu}{\sigma}>\frac{66-64}{3})\\\\=P(Z>0.67)\\\\=1-P(Z$

Thus, the probability that a randomly selected woman is taller than 66 inches is 0.2514.

(c)

Compute the probability that the mean height of a random sample of 100 women is greater than 66 inches as follows:

$P(\bar X>66)=P(\frac{\bar X-\mu}{\sigma/\sqrt{n}}>\frac{66-64}{3/\sqrt{100}})\\\\=P(Z>6.67)\\\\\ =0$

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3 years ago

Evaluate the expression for x = -2, y = 3, and a = -4 5x-6y-3a ​

Evaluate the expression for x = -2, y = 3, and a = -4 5x-6y-3a