The sum of x and y is a rational number. Which statement is correct?
The number represented by y must be rational
The number represented by x must be rational.
The number represented by x may be rational or irrational.
D)
The number represented by x must be rational and the number
represented by y must be rational

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: