Agroup of friends are hiking on trail y when they reach an intersection with trail x. trail x is perpendicular to trail y. if trail y has a slope of -2 which of the following statements are true

What is the total surface area of the square pyramid

How do you figure out which order to do two step equations in? like which thing do you subtract/add/multiply/divide first? i understand that you do the opposite of whatever's shown on the opposite side, but when?

What is the probability of getting heads when flipping a coin and getting a number greater than or equal to 4 when rolling a single die?