Answer:
-3
Step-by-step explanation:
(x+3)(x-1) - x(x+2)
Foil the first term
First x^2
outer -x
inner 3x
last -3
Add them together
x^2 -x+3x-3 = x^2 +2x-3
x^2 +2x-3 - x(x+2)
Distribute the second term
x^2 +2x-3 -x^2 -2x
Combine like terms
-3
1/2 (room 2) + 3/10 (room 4) = 8/10
Simplifying the fraction: 4/5
Answer would be 4/5 of the dishes were cooked by rooms 102 and 104
Hope it helps! Good luck!
Mark me as brainliest pls!
g(5) means we substitute every x in the equation with a 5.
g(5) = (5)^2 - 4.
g(5) = 21.