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3 years ago

WILL GIVE BRAINEST TO CORRECT ANSWER (50 points)

Mathematics

2 answers:

LuckyWell [14K]3 years ago

6 0

Answer:

The system of equations has infinite solutions. True for all y and x.

Given equations:

x + 4y = 0

20y = - 5x

Make x the subject for equation 1:

x + 4y = 0

x = -4y

Plug x as -4y in second equation:

20y = - 5x

20y = - 5(-4y)

20y = 20y

0 = 0

L.H.S = R.H.S

True for all y.

Therefore true for all x.

KatRina [158]3 years ago

5 0

Answer:

x=1 y=(-1/2) putting those in 20x1=20 so 20= then you put -1/2 and multiply it by the -5 that would be your answer

Step-by-step explanation:

You might be interested in

You wish to prove that three propositions p1, p2, and p3 are equivalent. will it suffice to show that p1 --> p2, p2 --> p3

kompoz [17]

Answer:

It is sufficient to prove that $p_1\implies p_2, p_2\implies p_3, p_3\implies p_1$

Step-by-step explanation:

The propositions $p_1,p_2,p_3$ being equivalent means they should always have the same truth value. If one of them is true, then all of them must be true. And if one of them is false, then all of them must be false.

Suppose we've proven that $p_1\implies p_2, p_2\implies p_3, p_3\implies p_1$ (call these first, second and third implications).

If $p_1$ was true, then by the first implication that we proved, it would follow that $p_2$ is also true. And then by the second implication that we prove it would follow then that $p_3$ is also true. Therefore the three of them would be true. Notice the reasoning would have been the same if we had started assuming that the one that was true was either $p_2~or~p_3$ . So one of them being true makes all of them be true.

On the other hand, if $p_1$ was false, then by the third implication that we proved, it would follow that $p_3$ has to be false (otherwise $p_1$ would have to be true, which would be a contradiction). And then, since $p_3$ is false, by the second implication that we proved it would follow that $p_2$ is false (otherwise $p_3$ would have to be true, which would be a contradiction). Therefore the three of them would be false. Notice the reasoning would have been the same if we had started assuming that the one that was false was either $p_2~or~p_3$ . So one of them being false makes all of them be false.

So, the three propositions always have the same truth value, and so they're all equivalent.

5 0

3 years ago

If y varies directly as x and y = 36 when x=9 find the value of y when x=3

Temka [501]

I think the answer is 12

because
y=36, x=9
y=?, x=3
so you divide 36 by 3 to get the other y

Hope this helps

3 0

3 years ago

The frequency table shows the results asking people how many hours they spend online per week

igomit [66]

The histogram is attached with the answer.

<h3>What is a Histogram ?</h3>

It is a mathematical representation of data in a bar shaped graph , the range is user defined.

The histogram is drawn and the shape of the histogram is left skewed as the peak of the graph lies to the left of the centre.

The histogram is attached with the answer.

The complete question is

the frequency table shows the results of a survey that asked people how many hours they spend working in the yard per month. display the data in a histogram. describe the shape of the distribution

The data is attached with the answer.

To know more about Histogram

brainly.com/question/16819077

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