David is working on adding and subtracting monomials. Which pair of monomials cannot be combined to simplify the expression?

A. 19xy + xy
B. xy + xy
C. xy - 28xy
D. x + y + 5xy

Will mark brainliest if you answer ! the taco shop sold 198 lunches friday. this number is 3 more than 3 times the number they sold monday. let n represent the number of lunches sold monday. which equation shows an equality between two different ways of expressing the number of lunches sold on friday? a. n – 3 = 198 b. 3n – 3 = 198 c. 3n + 3 = 198 d. n + 3 = 198

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

Adozen bananas weigh 3 pounds how many ounces does 1 banana weigh