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LuckyWell [14K]
3 years ago
14

Can someone please help me solve this system of equations

Mathematics
1 answer:
sergejj [24]3 years ago
4 0

Answer:

x=15 and y=2

Step-by-step explanation:

The given system of equations is

8y - x = 1                    ...............(i)

and

10 y = x + 5                 ...............(ii)

Now from equation (ii)

10 y = x + 5

subtracting -5 from both sides

10 y - 5 = x + 5 - 5

10 y -5 = x  

or

x = 10y -5 ............(iii)

Put this in equation (i)

it becomes

8y - (10y -5) = 1

8y-10y+5=1

-2y+5 =1

subtracting 5 from both sides

-2y + 5 -5 = 1 -5

-2y = -4

dividing both sides by -2 gives

-2y / -2  = -4 / -2

y = 2

We got the value of y putting it in equation (iii) to get the value of x

as from equation (iii)

x = 10y-5

x = 10(2) - 5

x = 20 -5

x = 15

So this is the solution from the equations

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Answer:

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Step-by-step explanation:

In this data we have

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1) We formulate the null and alternate hypothesis as

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3)The test statistics used is

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First we set the criteria for determining the true of value of the variable. That whether the rats learn in less or more than 18 trials.

Then we find the value of z for the given significance value given and the test about to be checked.

Then the test statistic is determined and calculated.

Then both value of z and z alpha re compared. If the test statistics falls in the rejection region  reject the null hypothesis and conclude alternate hypothesis is true.

The figure shows that the calulated z value lies outside the given z values

4 0
2 years ago
You flipped a coin 50 times and got 23 heads.What is the experimental probability of getting a head? Write your answer as a frac
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Answer:

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Step-by-step explanation:


This problem is stating that every fifty times you flip a coin you get 23 heads. Finding the fraction is simple, it would be 23/50 because it is expressing the probability. The problem clearly states that every 50 times you get 23 heads. To find the decimal, take the fraction, 23/50, and multiply the numerator and denominator by 2. you get 46/100 which is 0.46. A percent is just a fraction out of a 100 which would make the percent 46.


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2 years ago
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Reason:

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6 0
1 year ago
Suppose that 45% of people have dogs. If two people are randomly chosen, what is the probability that they both have a dog
mylen [45]

Answer:

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Step-by-step explanation:

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p = 0.45

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<em />

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P(Dogs) = 0.45^2

P(Dogs) = 0.2025

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Step-by-step explanation:

5 0
3 years ago
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