Answer:

Step-by-step explanation:
we have

This is the equation of a vertical parabola open upward (because the leading coefficient is positive)
The vertex is a minimum
The equation of a vertical parabola into vertex form is

where
(h,k) is the vertex of the parabola
Convert the equation into vertex form
Move the constant term to the left side

Complete the square


Rewrite as perfect squares

therefore

The vertex is the point (-1,-6)
Answer:
2m if the diameter is 4m
Step-by-step explanation:
Answer:
40
Step-by-step explanation:
10 x 4 = 40
so if it was 1/2 instead of 1/4 than it would be 20
-1 17/20 and -1 8/10 can be compared easily if we give them common denominators. If we multiply the second fraction by 2, both fractions will have a denominator of 20.
8 * 2 = 16
10 * 2 = 20
New fraction: 16/20
-1 17/20 vs. - 1 16/20
-1 16/20 (-1 8/10) is greater. (For negative numbers, you can tell which one is greater by determining which one is closest to zero.)
Answer:

Step-by-step explanation:
