6 kilometers = 6000 meters
1 kilometer = 1000 meters
So, 1000 × 6
2n+9+5n=30 combine like terms on left side
7n+9=30 subtract 9 from both sides
7n=21 divide both sides by 7
n=3
Assuming you meant

Then you can compose the function g(x)

With the function

Because f (g(x) ) means that you first find (calculte)

and second you divide 7 by g(x) to obtain 7 / [√(8x+10) ].
So last week Paul worked 2.5x this week's hours, so he worked a total of 2.5x15= 37.5 hours last week.
Answer:
15 of $3 books and 4 of the $8 books
Step-by-step explanation:
15×3= 45
8 × 4= 34
45+32= 77