What is 8.4 x 5.2 i need help

Is the square root of 4 plus the square root of 16 rational?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Give me the equations of two lines that have the same slope but are not parallel.