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2 years ago

4x + 3y = 5 2x – y=5 Use substitution method

Mathematics

1 answer:

lukranit [14]2 years ago

7 0

Answer: Slope = -2.667/2.000 = -1.333

x-intercept = 5/4 = 1.25000

y-intercept = 5/3 = 1.66667

Step-by-step explanation: Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is 1.667 and for x=2.000, the value of y is -1.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of -1.000 - 1.667 = -2.667 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

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3 years ago

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Nostrana [21]

Answer:

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Step-by-step explanation:

We are trying to find the score of one exam that is no longer readable, let's give that score the name "x". we can also give the addition of the rest of 9 readable s scores the letter "R".

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since the mean is the addition of all values divided the total number of exams.

in a similar way we can write what the mean of just the readable exams is:

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Based on the equation above, we can find what "R" is by multiplying both sides by 9:

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