Which statement about these triangles is true?

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?