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DENIUS [597]
3 years ago
12

Given the equation y = 3x + 2 , what is the value of x when y = 8? A:2 B:4 C:6 D:9

Mathematics
1 answer:
stiv31 [10]3 years ago
3 0

Answer:

a

Step-by-step explanation:

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Thinking the perimeter of the rectangle is 3x + 2 + x + 3x + 2 + X.
givi [52]
They are both right because the first expression is the perimeter but expanded in terms of length.The second expression is shortened to be a factor expression but they both represent the length.
The benefit of the first one is you can see how it’s expanded and plug the numbers in and the second one is more easy to plug in the numbers with ease.
7 0
3 years ago
A coin is tossed 72 times. What is a reasonable prediction for the number of
Aneli [31]

Answer :

That’s it, the probability of getting tail on a single coin toss times the number of observations.

In this case, 1/2 * 72 = 36

However, there’s something called chance error. How much do you expect the result to differ from the expected value? It can be calculated as follows:

The Standard Deviation of this experiment is  √(0.5)(0.5) =0.5

The Standard Error is  √72 (0.5) ≈ 4.18330 round to the nearst tenth is 4

So, the expected value is 36, give or take 4.

And since the number of tails in a toss coin experiment is normally distributed, then you can expect the number of tails to be between -2 and +2 SEs from the expected value 95% of the time.

In other words, if you repeat this experiment a large number of times, you can expect to obtain between 27 and 43 tails 95% of the time.

Hope this helps

4 0
3 years ago
Helpppp hate factorisation
bazaltina [42]
The answer is (x-42)×(x+42)
7 0
3 years ago
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Who founded the most successful mission in texas? <br><br> PLEASE BE FAST
dolphi86 [110]

Answer:

San Antonio de Valero Mission.

Step-by-step explanation:

San Antonio de Valero, one of five Spanish missions established by Franciscans in what is now San Antonio, is most commonly known as the site of the battle of the Alamo (1836).

plz mark as brainliest

5 0
3 years ago
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A middle school wants to have its students see a movie at a local theater.The total cost of the movie and theater rental is $ 1,
vlabodo [156]

Answer: x = 1500/ n

Step-by-step explanation:

X- price per student

N- number of students

5 0
3 years ago
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