What is the circumference of a circle whose radius is 3 3/4ft?

Anyone know? will mark brainliest if correct!

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?