3 years ago

Will make brainiest to the first two people that answer correctly

Mathematics

1 answer:

mr Goodwill [35]3 years ago

3 0

Answer:

pi r^2 h

Step-by-step explanation:

pi * r^2 * h

area of circle * height

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How many partial derivatives of order 3 are for a function of 3 variables?

finlep [7]

Number of partial derivatives= number of variables x degree of derivative
In this case, it will be =3x3=9

8 0

3 years ago

The solution to the system of equation below is (−2, −1).

vesna_86 [32]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}2x-3y=-1&\text{multiply both sides by (-3)}\\11x-9y=-13\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-6x+9y=3\\11x-9y=-13\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad5x=-10\qquad\text{divide both sides by 5}\\.\qquad x=-2\\\\\text{put the value of x to the first equation:}\\\\2(-2)-3y=-1\\-4-3y=-1\qquad\text{add 4 to both sides}\\-3y=3\qquad\text{divide both sides by (-3)}\\y=-1$