XxMysteriousGirlxX

Yep, yep

This is NOT the answer but it SHOULD help you to UNDERSTAND how to evaluate an expression!

"To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression."

Cited from www.mathplanet.com

Hope it helped you to understand how to do this!

Let us think like that: How many times for 12 hours do the two hands meet? 11. You can imagine this: the first time to short hand is between 12 and 1, the second time between 1 and 2, etc. Between two meets they make a right angle exactly twice, this is 11*2 = 22 times right angle per 12h.

Now we have 22*2 = 44 times per 24h. And yes, we can double since at 12pm the two heads are one above the other as in the very start at 12am.

Hope it helped!