Simplify : 5a(a^2-7a+6) if a=1 and a=-1​

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?

If angle ase measures 168 degrees, find the measure of angle dse. the figure mag not be drawn to scale

Explain how you can show five less than a number using algebraic expression