3 years ago

Which of the following equations correctly represents the law of cosines?

Mathematics

1 answer:

dusya [7]3 years ago

7 0

Answer:

Step-by-step explanation:

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2(5x + 7) = 34 Someone help me

Pepsi [2]

Answer:

x = 2

Step-by-step explanation:

2(5x + 7) = 34

10x + 14 = 34

10x = 34 - 14

10x = 20

x = 20/10

x = 2

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4 years ago

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Marina CMI [18]

Answer:

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3 years ago

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Step-by-step explanation:

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3 years ago

Which expression is equivalent to (9x - 3 1/8)-(7x + 1 3/8)

strojnjashka [21]

2x - 4 1/2 is equivalent

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3 years ago

A scientist is interested in the effect of time spent with parents and number of hours

gladu [14]

Answer: If X = 5, z=-3

If X = 37, z= 3.4

Step-by-step explanation:

We know that the formula to find the z-score for any random variable x is given by :-

$z=\dfrac{x-\mu}{\sigma}$

, where $\mu$ = Population mean

$\sigma$ = Population standard deviation.

As per given , we have

$\mu=20\\\\\sigma=5$

Then , the z-score for x =5

$z=\dfrac{5-20}{5}=\dfrac{-15}{5}=-3$

i.e. If X = 5, z=-3

When x =37,then $z=\dfrac{37-20}{5}=\dfrac{17}{5}=3.4$

i.e. If X = 37, z= 3.4

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3 years ago