Linda had been collecting stamps for 5 weeks and had 25 stamps in her stamp book. her book holds 64 stamps. she then began purchasing 3 stamps each week.

what was the total number of weeks that it took linda to fill her stamp book?

Ineed in figuring out this problem.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

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.