You and 4 friends plan a surprise party. each of you contributed the same amount of money m for food.

m denotes how much money each person contributes. 

Let n be the number of friends. 

Let 1 denote including yourself

Let T denote the total amount of money. 

T = m(n+1) 

If you have 4 friends, 

T = m(4+1) 

T = ($5.25)(5) 

T = $26.25 

Then they've spent $26.25 altogether (Includes yourself contributing)

2t+4

step-by-step explanation:

lo ; )