Will mark brainliest to whoever can answer

What is the value of x? enter your answer in the box. photo attached.

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Which of the following best describes the graph below? + + 2 + 3 + 4 1 o a. it is not a function. o b. it is a one-to-one function. o c. it is a many-to-one function. o d. it is a function, but it is not one-to-one.