3 years ago

Classify the expression: 5x^2 + 2x - 6

1 answer:

svp [43]3 years ago

4 0

Answer:

A second degree polynomial or a positive quadratic.

Step-by-step explanation:

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Troyanec [42]

174.97$ is the answer.
How I did it:
419.92 / 2.4 = 174.966 which rounds to 174.97$

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3 years ago

Makovka662 [10]

X^2 - x - 6 > 0
(x - 3)(x + 2) > 0
x < - 2 or x > 3

answer
x < - 2 or x > 3

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3 years ago

Sonja [21]

LM=ZW

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3 years ago

Shtirlitz [24]

Answer:

900 sample size

Step-by-step explanation:

To determine the sample size for a proportion, the margin of error formula is used to determine this:

$E=Z_{\frac{\alpha}{2} }*\sqrt{\frac{\hat p \hat q}{{n} }$

$n=\hat p \hat q*(\frac{Z_{\frac{\alpha}{2} }}{E} )^2$

Where p is the proportion, E is the margin of error, n is the sample size, q = 1 - p, $Z_\frac{\alpha }{2}$ is the z score.

Since the proportion is not known, the sample size needed to guarantee the confidence interval and error is at p = 0.5 and q = 1 - p = 1 - 0.5 = 0.5

E = 5% = 0.05, $Z_\frac{\alpha }{2}$ = 3. Hence:

$n=0.5*0.5*(\frac{3}{0.05} )^2\\\\n = 900$

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3 years ago

Zinaida [17]

Thank.........you......so.........much.....

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2 years ago