9. a submarine dove 400 feet. it then
rose at a rate of 20 feet per minute.
what was the depth of the submarine
after 18 minutes?
d
is

step-by-step explanation:

9 x 8 divided by (5-3)=36

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

i think the correct option is the second option.