Answer:
20
Step-by-step explanation:
20/5 = 4
hope that helps:)
144+64= 178

a^2+b^2= c^2
Whenever finding a missing length use the formula up above :
a^2+b^2= c^2
a^2-b^2= c^2
144-64= 80

Answers are 13.3 and 8.9
Not an inequality but d-m=5v. (d-m)/5=v. Basically just isolate the variable