Evaluate the expression –0.4(3x – 2) + for x = 4

Pls! does anybody know a shortcut for answering these types of questions in the future?

Which best explains why this triangle is or is not a right triangle?

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?