Answer:
Option D. minimum value at −38
Step-by-step explanation:
we have

Let

Complete the square




------> equation of a vertical parabola in vertex form
The vertex is the point 
The parabola open upward-----> the vertex is a minimum
therefore
minimum value at −38
Answer:
5.3 or 28
Step-by-step explanation:
+
=
36+
=64
64-36=28

=5.29 or 5.3
Answer:40,600
Step-by-step explanation:
10x10x10x10=10,000
10x10=100
4x10,000+6x100
40,000+600=
40,600
Let the number be x. Then 1.25x = 325, or x = 260.
20% less than 260 is 0.80(260) = 208