Solve the equation and check the solution. a + 2.4 = 7.8

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

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.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base