Answer 1
1/46 = 2/92 = 3/138
Answer 2
x = -7
Answer 3
40
Step-by-step explanation:
for a perpendicular,
make x the subject.
8x=11-3y
x=11/8 +3/8
for a perpendicular, the gradient
x= -1/m
x= (-1/11/8) - (-1/3y/8)
x= 8/3y -8/11.
therefore the gradient (m) = 8/3y -8/11.
Answer:
None
Step-by-step explanation:
The amount of salt in the tank changes with rate according to


which is a linear ODE in
. Multiplying both sides by
gives

so that the left side condenses into the derivative of a product,

Integrate both sides and solve for
to get


Given that
, we find

and we get the particular solution

