Determine if the expressions are equivalent.

12. 7+7x; 7(x+1/7)

13. 2.5(3+x); 2.5+7.5

How can you decide witch operations to use to slice a two step equation

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

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?