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4 years ago

Solve. x^2 8x 25 = 0

1 answer:

6 0

This equation is unsolvable.
x^2+8x+16=0
(x+4)^2+9=0
(x+4)^2= -9
anything to the power of whatever has to be greater than -1, it means it can be 0 or more but never a negative number. If it is a negative number, then it is false.

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Guillermo used the fact that a highway bus traveled 275 miles in 5 hours to find the unit rate. How can he check his answer? Mul

miskamm [114]

Answer:

a:multiply the unit rate by 5 hours and see if it equals the total distance.

Step-by-step explanation:

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3 years ago

I didn’t do this but my friend needs help so help

yuradex [85]

Answer:

1. X = 14

2.X =13

Step-by-step explanation:

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3 years ago

The number of accidents on a certain section of I-40 averages 4 accidents per weekday independent across weekdays. Assuming the

AysviL [449]

Answer:

1.83% probability there are no car accidents on that stretch on Monday

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given time interval.

The number of accidents on a certain section of I-40 averages 4 accidents per weekday independent across weekdays.

This means that $\mu = 4$

What is the probability there are no car accidents on that stretch on Monday?

This is P(X = 0).

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-4}*(4)^{0}}{(0)!} = 0.0183$

1.83% probability there are no car accidents on that stretch on Monday

5 0

3 years ago

A total of 9 identical pens cost $7.20 . What was the price for each individual pen?

tester [92]

Answer:

let the price of a pen be x

9 pens cost 7.20, so 9x costs 7.20. Therefore,

9x = 7.20

x = 0.8

Each pen is 0.8 dollars (80 cents).

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3 years ago

What does 10c+4d=40 some one please help i am stuck on this math problem

Ainat [17]

Answer:

14d=40 find 40/14

Step-by-step explanation:

this answer is a decimal

8 0

3 years ago