What is the probability of getting either a nine or an ace when drawing a single card from a deck of 52 cards?

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

What is the value of the expression below? 148+(-6)| + |– 35= 7|