when you multiply $1.59 by 5 you get $7.95
when you multiply $1.87 by 2 you get $4.74
so when you subtract them you get $3.21
the top is adding 1 and the bottom is subtracting 5
Answer:dy/dt(x=3)=54
Step-by-step explanation:
We know that we can write:

and so evaluate it as a product of functions, that is for a given value of x or t, we get that
.
Now we are told that:
whenever it happens, this means the influence of t is hidden, and we only consider the result, that is, how much is x when the derivative has the value of 2, we are not concerned for what value of t it happens, since we get all the necessary information beforehand.
Now we need to calculate
.
Therefore
or
.
It is 7
2*2x = 4x + 2 = 30
4x = 28
x = 7