Rút gọn bthuc 7x(4y-x) + 4y(y-7x) - (4y^2 -7x)
1 answer:
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Answer:
The answer is
Step-by-step explanation:
We must find a solution where
Consider the Left Side:
First, to add fraction multiply each fraction on the left by it corresponding denomiator and we should get
Which equals
Add the fractions
Simplify the right side by multiplying the fraction
Set both fractions equal to each other
Since the denomiator are equal, we must set the numerator equal to each other
Answer:
D: {(-5, -4, 2, 2, 5)}
R: {(-6, 3, 4, 1, 5)}
The relation is NOT a function.
Step-by-step explanation:
By definition:
A relation is any set of ordered pairs, which can be thought of as (input, output).
A function is a <em><u>relation</u></em> in which no two ordered pairs have the same first component (domain/input/x value) and different second components (range/output/y value).
Looking at the given points in your graph, and in listing down the domain and range, we can infer that the relation is not a function because there is an x-value (2) that has two corresponding y-values: (2, 4) (2, 1).
Another way to tell if a given set of points in a graph represents a function by doing the "Vertical line test." The graph of an equation represents y as a function of x if and only if no vertical line intersects the graph more than once. Looking at the attached image, I drew a vertical line over points (2, 4) (2, 1). The vertical line intersects the two points, which fails the vertical line test. This is an indication that the given relation is not a function.
