Answer:
Third side must be greater than 7 and less than 17
Step-by-step explanation:
If a triangle has two sides of lengths 5 and 12, the value for the length of the third side be greater than 7 and less than 17.
Answer:
10x^2 - 18.
Step-by-step explanation:
We replace the x in g(x) by f(x):
g(x) = 5x + 7 so:
g(f(x)) = 5(2x^2 - 5) + 7.
Now we simplify:
10x^2 - 25 + 7
= 10x^2 - 18.