Determine whether the following progression is arithmetic, geometric, harmonic, or none of the above. If arithmetic or harmonic, find the common difference, d. If geometric, find the common ratio, r. 1, 2, 4, 7, 11, …  

Solve the proportion. Round your answer to one decimal point and type just the numeric value below.   

The Africans brought all of the following from their culture to the Americas except:

A ray (select one):

A line (select one):

Determine whether the progression above is arithmetic, geometric, harmonic, or none of the above. If arithmetic or harmonic, state the common difference, d. If geometric, state the common ratio, r. 80, 20, 5, …

Europeans considered chocolate a powerful aphrodisiac.

Use the quadratic formula to solve for x:  2×2 + 4x – 30 = 0

The “Three Sisters” are

Food historian Clifford Wright destroyed the myth of Marco polo and pasta.