9514 1404 393
Answer:
5
Step-by-step explanation:
When y varies inversely as x, the relation is ...
y = k(1/x) = k/x
Multiplying by x gives ...
xy = k
The value of k can be found from (x, y) = (10, 10):
(10)(10) = k = 100
Then the new value of x will be ...
x(20) = 100
x = 100/20 = 5
