Step-by-step explanation:
0.2m^3 = 0.0000002 cm^3
X^2 - 7x + 12 = 0
x^2 - 4x - 3x + 12 = 0
x (x - 4) -3 ( x - 4) = 0
(x - 4) (x - 3) = 0
x = 3 , 4
Check the answer by plugging in 3 and 4 for x, if the equation equals zero then you have your answer.
Y=x+10
y is the total cost
x is the number of toppings times $1
10 is the cost of the pizza
