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4 years ago

Y = 2x2 + 12x + 14 A of S: Vertex: Opens: UP / DOWN

Mathematics

1 answer:

WINSTONCH [101]4 years ago

4 0

Answer:

AOS = x=-3 Vertex is (-3,-4) open down

Step-by-step explanation:

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John makes $400 per week. What does it mean for him to get a 150% salary raise? Explain in words and then give an example showin

nordsb [41]

Answer:

1200

Step-by-step explanation:

400 x 300 because double

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3 years ago

Can someone solve this for me pls

adelina 88 [10]

Answer:

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Step-by-step explanation:

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3 years ago

An advertising agency that serves a major radio station wants to estimate the mean amount of time the station’s audience members

Flura [38]

Answer:

$n=(\frac{1.645(45)}{5})^2 =219.18 \approx 220$

So the answer for this case would be n=220 rounded up to the nearest integer

Step-by-step explanation:

Information given

$\sigma = 45$ represent the population deviation

$ME = 5$ represent the margin of error

The margin of error for the true mean is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =5 and we are interested in order to find the value of n, if we solve n from equation (4) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 90% of confidence interval now can be founded using the normal distribution. The significance level is $\alpha=1-0.9=0.1$ and the critical value would be $z_{\alpha/2}=1.645$ , replacing into formula (b) we got:

$n=(\frac{1.645(45)}{5})^2 =219.18 \approx 220$

So the answer for this case would be n=220 rounded up to the nearest integer

5 0

4 years ago

Read 2 more answers

Help with this question plzzzzzz

Pie

Answer:

C) 145 degrees

Step-by-step explanation:

angles 2 and 5 are same side interior angles, which means they're supplementary. (they add together to make 180)

using that, you can make the following equation:

(x is angle 2 to avoid confusion)

35 + x = 180

<em>subtract 35 from both sides</em>

x = 180 - 35

x = 145

7 0

3 years ago

Read 2 more answers

(-11x^2 +6) - (14x^2 +2)

Nataly [62]

Answer:

−1(5−2)(5+2)

Step-by-step explanation:

Eliminate redundant parentheses

(−11²+6)−1(14² +2)

Distribute

−11² + 6 -- 1(14² +2)

−11² + 6 - 14² − 2

8 0

3 years ago