Answer:
The function is increasing for all real values of x where
x < –4.
Step-by-step explanation:
we have
This is a vertical parabola open downward (the leading coefficient is negative)
The vertex (h,k) represent a maximum
The roots of the function (or x-intercepts) are x=-6 and x=-2
The x-coordinate of the vertex is the midpoint of the roots
so
The y-coordinate of the vertex is
substitute the x-coordinate of the vertex in the quadratic equation
The vertex is the point (-4,4)
The function is increasing in the interval (-∞,-4)
The function is decreasing in the interval (-4,∞)
Answer:
Step-by-step explanation:
8.5 = √72.25
√72.25 < √74
To find the number of hours, divide the total distance by the speed.
Hours = 76 km / 14 km per hour
Hours = 4.529
Round the answer as needed.
Answer:-1
Step-by-step explanation: since there’s - -, it becomes a plus so then it’s -9+8 which equals to -1
8 times 3.5 hours is 1,680 miles, 6 times 210 minutes is 1260, and 15 times 210 is 3150. Added together is 6090.