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.

i dont know if you cant find a way its best to actually add all of them start from 105 tho

step-by-step explanation:

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or