Find the sum or difference of the following.
(42y + 7) - (3y + 6)

Identify whether the figure has plane symmetry, symmetry about an axis, or neither.

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line