Tina practiced piano for 15 hours last month and 45 hours this month A. Use multiplication to write a statement comparing the hours Tina practice during the two months B. Use addition to write a statement comparing the hours Tina practice during the two months

Answer: The answer is (a) 3 * x = y and (b) x + x + x = y.

Step-by-step explanation: Let 'x' and 'y' denote the number of hours that Tina practised last month and this month respectively.

Then, according to the given information, we have

x = 15 and y = 45.

We can write the relation between 'x' and 'y' in two forms as follows -

(a) Multiplication form : 3 * 5 = 15 implies 3 * x = y.

(b) Addition form : 15 + 15 + 15 = 45 implies x + x + x = y.

Thus, the answers are (3 * x = y) and (x + x + x = y).