Find the unique four-digit integer n with these properties:

the last digit (the units digit) of n is 9.

the digits of n add up to 27.

two digits of n are the same.

n is a perfect square

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 is he correct? explain why or why not?

Explain how you can show five less than a number using algebraic expression