Marissa bought 6 boxes of nails. she paid $0.74 for each box. how much did marissa pay for the nails? justin throught the answer was $44.40. is justin's answer reasonable

No, Justin's guess of $44.40 is not reasonable. If you take the price of a single box of nails and multiply by the amount of boxes Marissa purchased you get $4.44.

Equation:
.74 x 6 = 4.44

The $4.44 represents how much Marissa spent to buy all six boxes of nails. If Marissa only spent $4.44 then it is not possible for each nail to be $44.40. 

The answers are 10/24 and 9/24.

Step-by-step explanation:

Given:

Tim has 5/12 of a jar of blackberry jam and 3/8  of a jar of strawberry jam.

Now, to write using a common denominator.

So, we get the multiples of denominator of the fractions to get common denominator:

12 - 12, 24, 36.

8  -  8, 16, 24.

Here we see that 24 is the common denominator.

Now, we multiply the numerator and denominator with the same number to get the common denominator of the fractions:

⇒  

⇒  

Therefore, the answers are 10/24 and 9/24.