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3 years ago

Suppose a < -1. what must be true about the value of b so that ab < a? PLEASE HELP

1 answer:

6 0

Answer: A, B, and C are positive constants and that x+y= C. Show that the minimum value of +Ax%5E2%2BBy%5E2+ occurs when .

Step-by-step explanation:

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Determine the maximum number of zeros of the polynomial function 5x^3-3x^2+2x+3.

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What is 4 1/3 times 4 3/5

dimulka [17.4K]

Answer:

19 14/5

Step-by-step explanation:

4 1/3 x 4 3/5

13/3 x 23/5

299/15 = 19 14/5

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Steve had 4848 48 48 chocolates but decided to give 88 8 8 chocolates to each of his ff f f coworkers. How many chocolates does

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Since the amount of coworkers would be the variable in this expression, the equation would be 48-8x

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3 years ago

The accompanying frequency distribution represents the square footage of a random sample of 500 houses that are owner occupied y

ioda

Answer:

$\bar X = \frac{\sum x_i f_i}{n} = \frac{1220750}{500}=2441.5$

$s^2= \frac{3408029125 -\frac{(1220750)^2}{500}}{500-1} =856849.7$

$s= \sqrt{856849.7}=925.662$

Step-by-step explanation:

For this case we can create the following table

Interval Frequency (f) Midpoint(xi) xi *f xi^2* f

0-499 9 249.5 2245.5 560252.3

500-999 13 749.5 9743.5 7302753

1000-1499 33 1249.5 41233.5 51521258.25

1500-1999 115 1749.5 201193.5 361986278.8

2000-2499 125 2249.5 281187.5 632531281.3

2500-2999 81 2749.5 222709.5 612339770.3

3000-3499 47 3249.5 152726.5 496284761.8

3500-3999 45 3749.5 168727.5 632643761.3

4000-4499 22 4249.5 93489 397281505.5

4500-4999 10 4749.5 47495 225577502.5

Total 500 1220750 3408029125

$\sum f_i = 500 , \sum x_i f_i = 1220750, \sum x^2_i f_i = 3408029125$

For this case we can calculate the sample mean with this formula:

$\bar X = \frac{\sum x_i f_i}{n} = \frac{1220750}{500}=2441.5$

And for the sample variance we can use the following formula:

$s^2= \frac{\sum x^2_i f_i - \frac{(\sum x_i f_i)^2}{n}}{n-1}$

And if we replace we got:

$s^2= \frac{3408029125 -\frac{(1220750)^2}{500}}{500-1} =856849.7$

And the deviation is just the square root of the sample variance and for this case is:

$s= \sqrt{856849.7}=925.662$

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3 years ago

LOTS OF POINTS WILL GIVE BRAINEST PLZ PLZ PLZ BE QUICK!

Soloha48 [4]

Answer:

-4/5

Step-by-step explanation:

The fraction is not considered an integer because integers are all whole numbers and their opposites. This means all numbers that are not fractions.

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3 years ago