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3 years ago

Solve the system of linear equations by adding or subtracting -6x+y=5 7x-y=-4

Mathematics

2 answers:

bekas [8.4K]3 years ago

8 0

Adding you make it the opposite of

viva [34]3 years ago

8 0

You would add these equations together to solve by elimination. It is easiest to solve first for x because y cancels right off the bat.
You should get (1,11) as your solution

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Zigmanuir [339]

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3 years ago

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Suppose the average tread-life of a certain brand of tire is 42,000 miles and that this mileage follows the exponential probabil

Ahat [919]

Answer: The probability that a randomly selected tire will have a tread-life of less than 65,000 miles is 0.7872 .

Step-by-step explanation:

The cumulative distribution function for exponential distribution is :-

$P(X\leq x)=1-e^{\frac{-x}{\lambda}}$ , where $\lambda$ is the mean of the distribution.

As per given , we have

Average tread-life of a certain brand of tire : $\lambda=\text{42,000 miles }$

Now , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles will be :

$P(X\leq 65000)=1-e^{\frac{-65000}{42000}}\\\\=1-e^{-1.54761}\\\\=1-0.212755853158\\\\=0.787244146842\approx0.7872$

Hence , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles is 0.7872 .

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3 years ago

Highest/greatest common factor of 50 and 125

Nata [24]

50 =2×5×5 125=5×5×5 Hoghest common factor = 5×5 =25

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2 years ago

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What is the LCM of 28,40, and 144

Simora [160]

Answer:

2 x 2 x 7 = 28 2 x 2 x 2 x 5 = 40 2 x 2 x 2 x 2 x 3 x 3 = 144 2 x 2 x 2 x 2 x 3 x 3 x 5 x 7 = 504... ... The LCM of the given two numbers using prime factorization is 36 ...

Step-by-step explanation:

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3 years ago

How do you multiply fractions by whole numbers?

umka21 [38]

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2 years ago

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