Answer:
3/4
Step-by-step explanation:
1st one: 8x+1
2nd one:5m+4
Answer:
A triangle with side lengths 4 cm, 5 cm, and 15 cm
Step-by-step explanation:
In order to form a triangle with given side lengths, sum of any two sides must always be greater than the third side.

Answer:
129 degrees
Step-by-step explanation:
Space from D and E = 75
Space from E and F = 54
Space from D and F = 75 + 54
=> Space from D and F = 129 degrees