Your solutions are : X = 4, 3/2
f(x) means x = -2 if you multiply 1/2 by -2 you get -1
Well this one is very simple. It seems to give 1 lb per 4 dollars spent. So, the best way to state this mathematically is x=4y or x=4×y.
First subtract 4 from btoh sides of the equation
4 - 4 - 2x < 6-4
-2x < 2
Now divide both sides by -2
x > -1
NOTE: when dividing by a negative as above the inequality sign is flipped.
Answer:
area = 8x^2 - 2x - 15
Step-by-step explanation:
area = length x width
area = (2x-3) x (4x+5)
area = 8x^2 + 10x - 12x - 15
reduce:
area = 8x^2 - 2x - 15