B. 12 assuming that it is a right triangle :)
Given:
One -one function
Option D is one-one function.
Answer:
144
Step-by-step explanation:
4 triangles = 1/2 x 6 x 9 x 4 = 108
1 sq base = 6 x 6 = 36
total surface area = 36 + 108 = 144
if 3 triangles the base wouldn't be a square thus not possible to solve
Answer:
4 groups
Step-by-step explanation:
a^2 + 2a - 3 = 0
a^2 + 2a = 3
a^2 + 2a + 1 = 3 + 1 (I added a 1 to both sides)
a^2 + 2a + 1= 4
(a + 1)^2 = 4
a = -3, 1