(2x + y = – 4 (x + y = -7
a. Find the first variable and isolate it. Then solve for that variable.
b. Solve for the second variable.
c. Find the numerical value of the first variable.
d. Check your solution.

Which system of linear inequalities is graphed? can somebody pleasssse

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

Me asap! what is the slope of this line? enter your answer in the box.