Which expressions are equivalent to the one below? check all that apply : ) 5^x a- (15/3)^x b- 5*5^x-1 c- 15^x/3 d- 15^x/3^x e- x^5 f- 5*5^x+1

The school board administered a math test to all students in grade 66 at high achievers charter school and determined that 15\%15% of them were below grade level in math. based on this data, which of the following conclusions are valid? choose 1 choose 1