9. Suppose y varies inversely with x, and y = 49 when x = 1/7. What is the value of x when y = 7?

a. 14

b. 2

c. 1

d. 7

10. Suppose y varies inversely with x, and y = 5 when x = 3. What is the inverse variation equation that relates x and y?

a. y = 3/x

b. y = 5/x

c. y = 15/x

d. y = 15x

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.