Answer: 
Step-by-step explanation:
I looked it up on my calculator. I hope this helps!! :)
❅☃ Scalene **All sides are different, none are the same**
❅☃ Equilateral **all three sides are equal in size and value** and
❅☃Isosceles **two sides are equal in size and/or value**
Answer:
A
Step-by-step explanation:
Answer:
x= 7, the number is 7
Step-by-step explanation:
4x-9= 19
4x=28
x=7