Answer: 3(10x+5)
Step-by-step explanation: 30/3=10x + 15/3=5
The missing length would be 76m.
I'm assuming you want an equation with a slope of -5 that also passes through the point (1, -7).
An equation that fits this is

Hope this helps!
Answer:
1.6 < x < 9.6
Step-by-step explanation:
The smallest the third side can be is greater than the difference of the other two sides
x > 5.6 -4
x > 1.6
The largest the third side can be is less than the sum of the other two sides
x < 5.6 +4
x < 9.6
1.6 < x < 9.6