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2 years ago

HURRY THIS IS MY LAST QUESTION What is the simplified form of the expression?

Mathematics

1 answer:

vampirchik [111]2 years ago

4 0

Answer:

3/ 7c2 d -7c = 4d -10

Step-by-step explanation:

combine like terms

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Tell what number you would add to each side of the inequality.<br> Please answer ASAP

Zinaida [17]

Answer: 6

Step-by-step explanation: Gets x by itself.

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2 years ago

In Exercises 3–10, use the Chain Rule to calculate the partial derivatives. Express the answer in terms of the independent varia

sashaice [31]

I'll use subscript notation for brevity, i.e.

$\dfrac{\partial f}{\partial x}=f_x$

$f(x,y,z)=xy+z^2\implies\begin{cases}f_x=y\\f_y=x\\f_z=2z\end{cases}$

$x(r,s)=s^2\implies\begin{cases}x_r=0\\x_s=2s\end{cases}$

$y(r,s)=2rs\implies\begin{cases}y_r=2s\\y_s=2r\end{cases}$

$z(r,s)=r^2\implies\begin{cases}z_r=2r\\z_s=0\end{cases}$

By the chain rule,

$f_r=f_xx_r+f_yy_r+f_zz_r=2xs+4zr=2s^3+4r^3$

$f_s=f_xx_s+f_yy_s+f_zz_s=2ys+2xr=6rs^2$

$x(r,s,t)=r+s-2t\implies\begin{cases}x_r=1\\x_s=1\\x_t=-2\end{cases}$

$y(r,s,t)=3rt\implies\begin{cases}y_r=3t\\y_s=0\\y_t=3r\end{cases}$

$z(r,s,t)=s^2\implies\begin{cases}z_r=0\\z_s=2s\\z_t=0\end{cases}$

By the chain rule,

$f_r=f_xx_r+f_yy_r+f_zz_r=y+3xt=3rt+3r+3s-6t^2$

$f_s=f_xx_s+f_yy_s+f_zz_s=y+4zs=3rt+4s^3$

$f_t=f_xx_t+f_yy_t+f_zz_t=-2y+3xr=3r+3s-12rt$

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2 years ago

Which quadrant is -150 degrees in?

podryga [215]

The top left and bottom left

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3 years ago

A rectangle that is 2 inches by 3 inches has been scaled by a factor of 7. What are the side lengths of the scaled copy? Give th

Liono4ka [1.6K]

Answer:

Step-by-step explanation:

Nbv

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3 years ago

Solve by the substitution method.

allochka39001 [22]

Answer:

x = -5 and y = 8 is the solution for the given equations.

Step-by-step explanation:

We are given the following information in the question:

$7x + 2y = -19\\-5x + y = 33$

We have to use substitution method to solve the following equations in two variables.

$-5x + y = 33\\y = 33 + 5x\\\text{Putting this value of y in the first equation}\\7x + 2y = -19\\7x + 2(33+5x) = -19\\7x + 66+10x = -19\\17x = -85\\\\x = \displaystyle\frac{-85}{17} = -5\\\\y = 33 + 5x = 33 + 5(-5) = 33-25 = 8$

Thus, x = -5 and y = 8 is the solution for the given equations.

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3 years ago