Answer:6km
Step-by-step explanation:
Given
when Alice finishes the race Becky is 8km From finishing line
and caitlin 12 km from finishing line.
Suppose t is the time require by Alice to finish the race
and
be the velocity of alice ,becky and caitlin
thus 
thus 
say t' is time required by beckey to complete 8 km thus

therefore for Caitlin

Thus caitlin will cover a distance of 6 km in t' time and 6 km away from finishing.
Answer:
I'm not completely sure so if this is wrong plz dont get mad but I think it might be 3 and 8/10
The ordered pair would be (-5,8)
Plug 35 in for z. Multiply 4 and 35 to get 140 then divide by 7 to get 20
Answer:
300ft^3
Step-by-step explanation:
I'm guessing what the question meant be triangular is a triangular prism.
The volume formula for a triangular prism is 1/2(lwh)
L=10
W=10
H=6
(6)(10)(10)=600
600/2=300
V=300ft^3
Hope this helps! :)