10ft squared
I think because 5 times 4 is 20 so 20 divided by 2 is 10 dividing braces of triangle
ANSWER
The choice is correct.

EXPLANATION
The equation of a parabola in vertex form is given by:

where (h,k) is vertex of the parabola and 'a' is the leading coefficient of the parabola.
From the given options, the leading coefficient must be a=1.
We also have the vertex of the parabola at (1,2). This implies that h=1 and k=2.
We substitute these values into the formula to get,

The second option is correct.
Answer:
y=2x-13
Step-by-step explanation:
According to y- y1= m( x-x1),
y-(-5)= 2 ( x-4)
So, y=2x -13
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Answer:
2x - 3y = Z
Step-by-step explanation:
5y + 2z = 2 + 12