Which of the following combinations cannot be the side lengths of a triangle? 1. 2.3 inches, 3.4 inches, and 3.2 inches
2. 4.8 inches, 5 inches, and 1.2 inches
3. 2.5 inches, 2.5 inches, and 2.5 inches
4. 6.7 inches, 1.1 inches, and 7.9 inches

9514 1404 393

 4.  6.7 inches, 1.1 inches, and 7.9 inches

Step-by-step explanation:

In order for three lengths to be able to form a triangle, the sum of the shorter two must exceed the longest.

1. 2.3 +3.2 > 3.4 . . . will form a triangle

2. 1.2 +4.8 > 5 . . . will form a triangle

3. 2.5 +2.5 > 2.5 . . . will form an equilateral triangle

4. 1.1 +6.7 = 7.8 ≯ 7.9 . . . will not form a triangle

_____

The symbol ≯ is "not greater than". The typeset version looks like ...

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

answer: x=60