What is the quotient of 7a/9bc ÷ 21a/12b

A. 4/3c
B. 4/9c
C. 3/4c

Tell whether the two rates form a proportion

Simplify the expression below -3(10x+4y)+6(6x-2y)

Complete the two-column proof. given: 5/x + 9 = 11 prove: x = 10 5/x + 9-11 select one: a. a. given b. subtraction property of equality c. division property of equality b. a. given b. subtraction property of equality c multiplication property of equality ca. given b. addition property of equality c. multiplication property of d. a. given b. addition property of equality c. division property of equality