19. 5x – 3y = -3
2x + 6y = 0

x=-1/2, y=1/6

Step-by-step explanation:

Use system of equations.

(5x – 3y = -3) *2 to get:

(10x-6y=-6)

+2x + 6y = 0

12x=-6

x=-1/2

Use either equation to find y with the x value we just found.

5(-1/2)-3y=-3

(-5/2)-3y=-3

-3y=-3+(5/2)=(-6/2)+(5/2)

-3y=(-1/2)

y=(-1/2)/(-3)

y=1/6

You can also check this on graphing websites to see where they intersect.

180 square centimeters

step-by-step explanation:

spinning a 1, 2, or 3. option d.

step-by-step explanation: when spinning a number graph up to 4, and aiming for any number less than 3, that automatically eliminates the number 4. now you have two numbers to spin on that are less than 3, but the number 3 is included in this question because it's no greater of an number than itself. i hope this you : )