Henry sells rings for $8 each. his expenses are $1.50 per ring, plus $91 for supplies. how many rings does he need to sell for his revenue to equal his expenses?

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.