Our parabola open downward and therefore a is negative.
Explanation:
As value of a changes from positive to negative or from negative to positive, the direction of opening changes. For negative values of a we got negative parabolas that open downward. As the original formula y = x^2 we see that x^2 will always be positive because when you square a number it always gives positive value. Therefore the direction for which it will open, depends on value of a.
Answer: F: I only
Step-by-step explanation:
Answer:
48 hours
Step-by-step explanation:
6 workers = 72 hours
1 worker = 72×6
= 432 hours
9 workers = 432/9
= 48 hours
Answer: It is -10
Explanation: This is because if you subtract from a negative you are actually adding to it.
