Is it possible to form a triangle with the given side lengths? If not explain why not. 14, 14, 19

yes
no; 14 + 14 > 19
no; 14 + 19 > 14
no; two sides have the same length

It is possible to form a triangle with those side lengths.

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.