X = 2 y − 4
7 x + 5y = −66

x = -8

y = -2

Step-by-step explanation:

The variable x in this system of equations is already isolated. Therefore, we can substitute it into the other equation and solve for y.

7(2y - 4) + 5y = -66

14y - 28 + 5y = -66

19y = -66 + 28

y = -2

Then we solve for x

x = 2(-2) - 4

x = -8

step-by-step explanation:

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: