Pretty sure it’s the first answer
<span><span>−<span>5x</span></span>−<span>15y</span></span>−<span>5 is what i get</span>
Answer:

Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
v varies directly with height means
v/h=k were k is a constant
or also h/v=k where k is a constant (this is a different k than previous)
so if h=12 and v=300 then
h/v=12/300=1/25=k
so the relationhip could be h/v=1/25
if you di v/h, then
v/h=300/12=25/1=25=k
so the relationship could be v/h=25
20000 because of the 7 is higher than 4 higher than 5