The scale on a map is 5 cm : 14 km.

If the distance between two cities is
56
56 km, how far apart in cm are the two cities on the map?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.