For this case we have the following equation:
Deriving we have:
We match zero:
We clear the value of x:
Then, we substitute the value of x in the equation of the parabola:
Thus, the vertex of the parabola is the ordered pair:
Answer:
The vertice is:
Step-by-step explanation:
survey a specific amount of students and ask then if they spend les that 2 hours a night of studying or 2 or more hours a night studying.
Answer:
10 -> 14
15-> 19
20-> 24
25-> 29
Step-by-step explanation:
Add 4 each time
Let's calculate the actual area: it is 11*5.6*7.2 or 443.52 cubic meters. Is the 100+ cubic meters error reasonable? :)
Answer:
The speed of the jet in still air is 260 miles per hour.
Step-by-step explanation:
Given that a small jet can fly 858 miles in 3 hours with a tailwind but only 702 miles in 3 hours into a headwind, to find the speed of the jet in still air the following calculation must be performed:
858/3 = 286
702/3 = 234
(286 - 234) / 2 = X
52/2 = X
26 = X
286 - 26 = 234 + 26
260 = 260
Therefore, the speed of the jet in still air is 260 miles per hour.
