Susan decided to plan a party and invite her friends. Her mom was willing to spend $20 on the party and Susan had another $5 of her own money that she would use. Pizza costs $5.99 each and include 6 slices. If each guest can eat 3 slices on average, how many friends can Susan invite?

8 people

Step-by-step explanation:

if you add 5.99+ 5.99 it equals 11.98 if you then add another 5.99 it equals 17.97 add one more 5.99 and it equals 23.96 dollars. if you divide it, it equals 4 pizzas.

4 pizzas with 6 slices each

if you divide that by 3 it equals 8

the people that can be invited are 8 people

I hope this helped :)

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18