casey has 42 necklaces and 70 pairs of earrings to put into sets to sell. the greatest common factor for the number of necklaces and the number of pairs of earrings is equal to the number of sets casey can sell find the number of sets casey can prepare to sell

Find and simplify the difference of the golden ratio and its multiplicative inverse

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?

Empty box + box + empty box fill in the box is equal to 30 how