Step-by-step explanation:
We have (x + y)² = (x + y)(x + y) = x² + 2xy + y².
Let x be 3a and y be 2.5b.
Therefore (3a + 2.5b)²
= (3a)² + 2(3a)(2.5b) + (2.5b)²
= 9a² + 15ab + 6.25b².
Hence the '*' sign should be replaced with 15ab.
5.33
3/2.3=1.3
1.3x4.1=5.33
Answer:
2139m (total area)
Step-by-step explanation:
I am like 98% sure this is right
23* 31= 713 (1 side area)
713+713=1426 (2 sides area)
31-12=19 (middle height)
19*23= 437 (middle area)
437+1426=2139m (total area)
I'm thinking it's a hundred or a hundred feet squared
