Solve the following system of equations
1.2x+2.4y= -18
-.8x+ .4y = 6

HELP I need the answer RIGHT NOW ASAP (I spaced it out so you could see it better)

Step-by-step explanation:

The given systems is;

Divide the top equation by 1.2 and the bottom equation by by 0.8 to get:

Now add both new equations:

Let us substitute x=3 into x+2y=-15 and solve for y.

3+2y=-15

2y=-15-3

2y=-18

y=-9

The solution is (x=3,y=-9)

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

3+x

step-by-step explanation: