SAT Practice74a8d55a-4db1-41ce-9d72-b5498e6a1d89
Practice one SAT question at a time

Questions come from the Bluebook question bank.

The expression 90 y 5 - 54 y 4 is equivalent to ry415y-9, where r is a constant. What is the value of r ?

Use the exact value the question expects unless it says to round.