I’m pretty sure it’s the 3rd one
Answer:
<h2>C. 71.2 in²</h2>
Step-by-step explanation:
We have the square in the base with side a = 4in and four triangles with base a = 4in and height h = 6.9in.
The formula of an area of a square:
A = a²
Substitute:
As = 4² = 16 in²
The formula of an area of a triangle:
A = (ah)/2
Substitute:
At = [(4)(6.9)]/2 = 27.6/2 = 13.8 in²
The Surface Area:
S.A. = As + 4At
Substitute:
S.A. = 16 + 4(13.8) = 16 + 55.2 = 71.2 in²
Answer:
2 (C)
Step-by-step explanation:
The "bisector" of the two sides is always equal to 1/2 of the base so...
2(3x-1) = 2x+6
Then, we simply btoh sides...
6x-2 = 2x+6
Then, we bring all the variables to one side and the numbers to the other..
4x = 8
Finally, we simplify to get our answer...
x=2 (C)