Answer:
3x^2+27y^2-18xy
Step-by-step explanation:
3(x-3y)^2
3 [(x-3y)(x-3y)]
3 [x^2-3xy-3xy+9y^2]
3 [x^2-6xy+9y^2]
open d bracket
3x^2-18xy+27y^2
rearrange
3x^2+27y^2-18xy
Answer:
no solutions
Step-by-step explanation:
there are no solutions
We were told that the distance
is directly proportional to the time
.
We write this mathematically as,

We can now introduce our constant of variation and write the equation for the direct equation as;

where
is the constant of variation or constant of proportionality.
We substitute
and
, in to the equation of variation to obtain the constant of proportionality.
That is;

This implies that,

This simplifies to give us,

Now our equation of proportion becomes,

When T=20


Writing this as a mixed number we obtain,

This can also be rewritten as
correct to one decimal places.
Therefore the care covers
miles in
minutes.
Answer:
50 C = 122 F
Step-by-step explanation:
50°C × 9/5 +32