Which expressions are equivalent to 4-2.7-2 ?

Mathematics

1 answer:

Sholpan [36]3 years ago

7 0

I think it’s A (4x7)-2

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Elizabeth is selling Jam at a farmers market and she earns $5 for each jar of jam that she sells

Anna11 [10]

You need to elaborate more

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3 years ago

At what point on the paraboloid y = x2 + z2 is the tangent plane parallel to the plane 3x + 2y + 7z = 2? (if an answer does not

Nikitich [7]

If $f(x, y, z) = c$ represent a family of surfaces for different values of the constant $c$ . The gradient of the function $f$ defined as $\nabla f$ is a vector normal to the surface $f(x, y, z) = c$ .

Given the paraboloid

$y = x^2 + z^2$ .

We can rewrite it as a scalar value function f as follows:

$f(x,y,z)=x^2-y+z^2=0$

The normal to the paraboloid at any point is given by:

$\nabla f= i\frac{\partial}{\partial x}(x^2-y+z^2) - j\frac{\partial}{\partial y}(x^2-y+z^2) + k\frac{\partial}{\partial z}(x^2-y+z^2) \\ \\ =2xi-j+2zk$

Also, the normal to the given plane $3x + 2y + 7z = 2$ is given by:

$3i+2j+7k$

Equating the two normal vectors, we have:

$2x=3\Rightarrow x= \frac{3}{2} \\ \\ -1=2 \\ \\ 2z=7\Rightarrow z= \frac{7}{2}$

Since, -1 = 2 is not possible, therefore there exist no such point on the paraboloid $y = x^2 + z^2$ such that the tangent plane is parallel to the plane 3x + 2y + 7z = 2.

4 0

4 years ago

What's the perimeter of this shape?

Strike441 [17]

Answer:

It is 20m.

Step-by-step explanation:

The perimeter equals the sum of all the sides. So 5+7+3+4+1

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3 years ago

Help...........................

Brrunno [24]

The answer is:
Y=3x
Explanation:
Every time that the x value moves to the right 1, the y increases by 3

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3 years ago

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expeople1 [14]

The answer is 3. You add 9 to it, get 12, the multiply by 3, you get 36. Subtract 16, you get 20. Add 7, get 27

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3 years ago