Anyone here that can help me with?

D. 16 years old

Step-by-step explanation:

Step 1: Let T be Tien's age and J as Jordan's age (today),

Step 2: Let T be Tien's age and J as Jordan's age (in 2 years),

Step 3: As their age differences will always be similar we can have the two equations above equal to find Jordan's age,

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or