To find out how much it will cost Mr. Imani to purchase 10 packs of paper and 30 notebooks, we can use the cost equation provided:
\[ \text{Total Cost} = 1.25p + 2.50n \]
Now, we can substitute \( p = 10 \) and \( n = 30 \) into the equation:
\[ \text{Total Cost} = 1.25(10) + 2.50(30) \]
Calculating each term:
\[ 1.25(10) = 12.50 \]
\[ 2.50(30) = 75.00 \]
Now, add the two amounts together:
\[ \text{Total Cost} = 12.50 + 75.00 = 87.50 \]
Therefore, the total cost for Mr. Imani to purchase 10 packs of paper and 30 notebooks is $87.50.