I’m pretty sure the answer would be B
Answer:
Marta
Step-by-step explanation:
We are given that

We have to find who is correct and explain.
We know that
Equation: It is mathematical sentence that combines numbers and variables which shows the equality of two expressions.
Example:

Expression: It is mathematical phrase that combines numbers and variables
using mathematical operators.It can be evaluated but not solved.
Example:

By definitions

It is in equation form.
Therefore, Marta is correct.
I think it'd be x=4 but I'm not 100% sure
Answer:
31
Step-by-step explanation:
(-1-2)^2+(-5-1)^2
(1+4)+(25+1)
5+26
31
Answer:
x=-1/2
Step-by-step explanation:
add 2 to both sides
3x=x-1
subtract x from both sides
2x=-1
divide by 2
x=-1/2