Because there are only two things you can do with these two " family" members. 81 divided by 9 is 9. 9 times 9 is 81. Strictly speaking, there should be three in the family: 9,9 and 81 9 is the square root of 81. 81 is the 9 squared.
Answer:
y is 90
Step-by-step explanation:
The y/x is proportional per point (x,y) since this is a direct variation.
That is ,
.
Cross multiply:

Simplify:

Divide both sides by -3


Answer:
% of a weeks visitor come to the website on an average day
Step-by-step explanation:
Visitors on the website per day 
Visitor on the website in seven day 
Percent of visitor on any average to the total visitors in a week

Answer:
6/7
Step-by-step explanation: