Find the three consecutive integers such as the sum of the first and third is 49 less than three times the second

Select the number of ways in which a line and a circle can intersect

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?