Answer:

With the vertex 
We see that b = -10 and a = 2 and then the vertes wuld be:

And the best option is:
b. (-10,2)
Step-by-step explanation:
For this problem we have the following function:

And if we compare this expression with the general expression for a parabola given by:

With the vertex 
We see that b = -10 and a = 2 and then the vertes wuld be:

And the best option is:
b. (-10,2)
Answer:
Area = 64 cm²
Step-by-step explanation:
The area of a parallelogram is found by using the formula A = b x h
Where A is the area, b is the base and h is the height
A = 16 x 4
A = 64
Answer:
4
Step-by-step explanation:
20
Because I used this website called http://www.alcula.com/calculators/statistics/variance/
Hope this helped :)