Answer:
44
Step-by-step explanation:
Given that Avi used 11 toothpicks to form a row of 5 attached triangles.
Total number of toothpicks used = 89
Let the total number of triangles formed be represented by x, so that:
11 toothpicks = 5 triangles
It would be observed that only the first triangle starting the pattern has 3 toothpicks. So that;
the average number of toothpicks for 1 triangle =
= 2.2
The number of toothpicks per triangle = 2.0
Thus,
x =
= 44.5
x = 44
The total number of triangles formed is 44.
(A)
Step-by-step explanation:
Multiply both sides by (x + 3)(x - 3)
4(x + 3) + 2 = (x- 3)
4x + 12 + 2 = x - 3
3x = - 17
or
x = -17/3
35 tens
tens = 10 ones = 0.1 hundreds
35 tens = 350 ones = 3.5 hundreds
So 35 tens = 3.5 hundreds