Type answer as whole number (no decimals, no units). ks: -
Help: Lecture 35, Ex. 35.2
1435
Avi measured an initial surface water salinity of 18 ppt, and predicted that, due to
mixing with bottom water, the surface salinity would increase at the constant rate of 2
ppt per hour. Kaila measured an initial bottom salinity of 30 ppt, and predicted the
bottom salinity would decrease at the constant rate of 1 ppt per hour. Assuming the
initial measurements were made at the same time, estimate how much time would
elapse before the surface and bottom salinities equal each other.
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yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

i would love   to but there is no graph shown

step-by-step explanation:

i am so sorry