Amap has a scale of 1 centimeter = 40 kilometer. if the distance between fort worth and el paso is 21.7 cm on a map , how many kilometers are between the two cities?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

How can writing phrases as algebraic expressions you solve problems?

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio