Suppose an archeologist finds a camel tooth that contains 42% of original amount of C-14. Find age of the tooth

Solve the system of equations. y= 2x y= x^2 - 15

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1