Answer:
Step-by-step explanation:
=7 (1+11+111+1111......n)
=7/9 (9+99+999+9999....n)
=7/9 ((10-1)+(10^2-1)+(10^3-1)+....n)
=7/9 ((10+10^2+10^3...n)-(1+1+1+1.....n))
=7/9 ((10 (10^n-1)/(10-1))-n)
Answer: (4, -1)
Step-by-step explanation: You have to rewrite in vertex form and use the form to find the vertex
20/2= 10
John makes 10 dollars an hour.
50/4= 12.5
Sally makes 12.50 dollars an hour.
Sally makes more than John.
I hope this helps!
~kaikers
Inversely variation means xy = c, where c is a constant
Since when y = 12 x = 5, then c = 12*5 = 60
So xy = 60
Now when x = 3, y = 60/3 = 20
