S+D+K=155
K=S+10
D=S-20
--------------------------------
S+(S-20)+(S+10)=155
S+S-20+S+10=155
3S-10=155
3S=165
S=165/3=55
---------------------------------
If S=55,
K=55+10=65
D=55-20=35
---------------------------------
Therefore, Sarah had worked for 55 hours, Kate had worked for 65 hours and Dave had worked for 35 hours.
Answer: x^2 - 10x + 14
Explanation:
f(g(x))
= f(x-3) Since g(x) = x-3
And f(x) = x^2 - 4x - 7
=> f(x-3) = (x-3)^2 - 4(x-3) - 7
=> f(x-3) = x^2 - 6x + 9 - 4x + 12 - 7
=> f(x-3) = x^2 - 10x + 14
ANSWER:
Exact Form: <u><em>1/12</em></u>
Decimal Form: <u><em>0.083</em></u>
