The variable is how many tanks there are because he wants to know how many fish there are in the whole aquarium and we already know each tank contains five fishes but we just need to know how many tanks there are. :)
Answer:
is that supposed to be 2x-16=0 cause if it is then
Step-by-step explanation:
2x-16=0
add 16
2x=16
divide by 2
x=16
Answer:
Step-by-step explanation:
If you enter all of these points in L1 and L2 in edit under your stat button on your calculator and then choose QuadReg from "calc" under the same stat button, you'll get a quadratic model:

Not sure which of your choices this matches, but there you go!
Translation of 7 to the left and 4 down