What is the product? (9r-4)(-9r-4)

1 answer:

6 0

Product = sum of multiplication
If you expand the polynomial using the FOIL method you get the answer of:
-81r^2 + 16

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1. Find the slope of the line passing through (-3,-4) and (-6,-2).

r-ruslan [8.4K]

Answer:

slope = - $\frac{2}{3}$

Step-by-step explanation:

Calculate the slope m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (- 3, - 4) and (x₂, y₂ ) = (- 6, - 2)

m = $\frac{-2+4}{-6+3}$ = $\frac{2}{-3}$ = - $\frac{2}{3}$

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4 years ago

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Simplify the expression. Write your answer as a power.5^8<br> 5^5

IgorC [24]

Answer:

5^13

Step-by-step explanation:

when multiplying numbers with the same base, you add the exponents

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3 years ago

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Which is the parent function for y = (x + 9) - 5

omeli [17]

Answer: y=x (linear parent function)

Step-by-step explanation:

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Data for a particular subdivision near downtown Houston indicate that the average price per square foot for a home is $100 with

spayn [35]

Answer:

$P(X>110)=P(\frac{X-\mu}{\sigma}>\frac{110-\mu}{\sigma})=P(Z>\frac{110-100}{5})=P(z>2)$

And we can find this probability with the complement rule and we got:

$P(Z>2) = 1-P(Z$

And using the normal standard table or excel we got:

$P(Z>2) = 1-P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the prices of a population, and for this case we know the distribution for X is given by:

$X \sim N(100,5)$