Cruz has d $10-bills and 2 fewer $20-bills than he has $10-bills. Enter an algebraic expression to represent how much money Cruz has in dollars.

Question

I need to know the expression and then the simplified expression if possible. Thank You.

Answer 1

Here's the basic equation

m(d) = 10d + 20(d - 2)  (the money total is the 10 dollar bills plus the 20 dollar bills (which are two less than the 10 dollars))

 

To simplify it, start by distributing the 20:

m(d) = 10d + 20d - 40

add like terms

m(d) = 30d - 40