Answer:
number a is correct answer
Answer:
Below.
Step-by-step explanation:
This is the correct solution:
6 - 2x + 5 + 4x
= -2x + 4x + 6 + 5
= 2x + 11.
It looks like they added unlike terms together (4x + 5) to give 9x (incorrect) then added the 4x to give 13x.
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: Surface Area = 16in.
Step-by-step explanation:
So we need to find the area of each side and add them up.
First we find the area of one of the triangular sides: 2*3/2 = 3
Then we multiply it by 4 to accommodate the 4 sides that are the same size: 12
Then we do 2*2 = 4 for the base. We then add those up.
4 + 12 = 16