Solve the problem.A commuter travels to work, driving a distance d at speed r. At the end of the day, she returns home and drives the same distance 4 mph faster, at a speed r + 4. Her average speed for the round trip can be represented by the expression 
Simplify this expression.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
You might also like to view...
Give all possible rational zeros for the polynomial.f(x) = x3 - 8x2 + 9x - 24
A. ±1, ±2, ±3, ±4, ±24
B. ±1, ± 
, ±2, ±3, ±4, ±6, ±8, ±12, ±24
C. ±1, ±2, ±3, ±4, ±6, ±8, ±12, ±24
D. ±1, ±2, ±3, ±4, ±6, ±12, ±24
Mathematics
2 fluid ounces = ? fluid drams
A. fldr 16 B. 2 fluid drams C. 4 fluid drams D. fldr 8
Mathematics
Establish the identity.cot2x = (csc x - 1)(csc x + 1)
What will be an ideal response?
Mathematics
Multiply.
A. - 
B. 0
C. 
D. - 
Mathematics