HELP If point A(3,1) is reflected across the line x = 1, what are the coordinates of its reflection image, A’?

A) (3,1)
B) (3,-1)
C) (-3,-1)
D) (-3,1)
E) (-1,1)
F) (1,-1)

What is the value of x in the diagram below?

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?