An expression is a number, a variable, or a combination of numbers and variables and operation symbols. An equation is made up of two expressions connected by an equal sign.
Answer:
the right answer would be 13
For the first one, you're answer would be AC. since C is also a right angle, and angle A is hypnotenuse to C
Answer:
2 
Step-by-step explanation:
The absolute value of a number is the value of x (the number) without a negative, 2 and a third is already positive, so that is the answer :D
Hope this helps, good luck! :)