3 years ago

A: What are the solutions to the quadratic equation 9x2 + 64 = 0?

Mathematics

1 answer:

nataly862011 [7]3 years ago

8 0

Answer:

B: (3x + 81)(x - 1)

Step-by-step explanation:

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Tayler took 560 photographs during summer vacation.She placed 12 photos on each page of her scrapbook.How many photos did Taylor

oksian1 [2.3K]

So 560 photos and 12 per page
to find out you divide
560/12
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Hope this helps :)

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3 years ago

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The hypotenuse of a right triangle measures 16 cm and one of its legs measures 11 cm.

Zarrin [17]

Answer:

11.6cm

Step-by-step explanation:

a^2+b^2=c^2

11^2+b^2=16^2

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Flauer [41]

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4 years ago

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foot locker uses sales per square foot as a measure of store productivity last year the mean annual sales per square foot was 39

lord [1]

Answer:

There is a 82% probability that th esample mean annual sales per square foot is at least $384.

Step-by-step explanation:

We have a population with mean 390 and standard deviation 45.83.

Samples of size n=49 are taken.

The parameters of the sampling distribution are:

$\mu_s=\mu=390\\\\ \sigma_s=\dfrac{\sigma}{\sqrt{n}}=\dfrac{45.83}{\sqrt{49}}=\dfrac{45.83}{7}=6.547$

First, we have to calculate the z-score that satisfies:

$P(z>z^*)=0.82$

This z-score, looked up in a standard normal distribution table, is z=-0.915.

Then, we can calculate the sample mean as:

$M=\mu_s+z\cdot\sigma_s=390+(-0.915)\cdot 6.547=390-6=384$

There is a 82% probability that th esample mean annual sales per square foot is at least $384.

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3 years ago