Answer:
A
Step-by-step explanation:
Dave jogged for 9 minuets and walked for 12 minuets
Step-by-step explanation:
step 1. a polynomial must have whole non negative exponents
step 2. A, B, D have negative exponents
step 3. C is a polynomial.
( 4 / 5 )^-2 = ( 5 / 4 )^2 = 25 / 16 ;
240/6=x
x=40
the number is 40