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2 years ago

6

14. Find mZCDB. B С 18 7 D 47° А A

1 answer:

Anna [14]2 years ago

8 0

Answer:

n,

Step-by-step explanation:

n

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No links, find the length of X in inches

krek1111 [17]

Answer:

107 inches

Step-by-step explanation:

28+45+x=180

x=180-28+45

x=180-73

x=107

7 0

2 years ago

Explain why all squares must be rectangles but not all rectangles are squares

Neko [114]

A square is a quadrilateral with all four angles right angles and all four sides of the same length. ... Thus every square is a rectangle because it is a quadrilateral with all four angles right angles. However not every rectangle is a square, to be a square its sides must have the same length.

5 0

2 years ago

Consider the following equation. f(x, y) = y3/x, P(1, 2), u = 1 3 2i + 5 j (a) Find the gradient of f. ∇f(x, y) = Correct: Your

BaLLatris [955]

$f(x,y)=\dfrac{y^3}x$

a. The gradient is

$\nabla f(x,y)=\dfrac{\partial f}{\partial x}\,\vec\imath+\dfrac{\partial f}{\partial y}\,\vec\jmath$

$\boxed{\nabla f(x,y)=-\dfrac{y^3}{x^2}\,\vec\imath+\dfrac{3y^2}x\,\vec\jmath}$

b. The gradient at point P(1, 2) is

$\boxed{\nabla f(1,2)=-8\,\vec\imath+12\,\vec\jmath}$

c. The derivative of $f$ at P in the direction of $\vec u$ is

$D_{\vec u}f(1,2)=\nabla f(1,2)\cdot\dfrac{\vec u}{\|\vec u\|}$

It looks like

$\vec u=\dfrac{13}2\,\vec\imath+5\,\vec\jmath$

so that

$\|\vec u\|=\sqrt{\left(\dfrac{13}2\right)^2+5^2}=\dfrac{\sqrt{269}}2$

Then

$D_{\vec u}f(1,2)=\dfrac{\left(-8\,\vec\imath+12\,\vec\jmath\right)\cdot\left(\frac{13}2\,\vec\imath+5\,\vec\jmath\right)}{\frac{\sqrt{269}}2}$

$\boxed{D_{\vec u}f(1,2)=\dfrac{16}{\sqrt{269}}}$

7 0

3 years ago

Matt has 20 marbles in a bag. 15 are red, 2 are blue, and 3 are green. what is the probability that Matt will pick a blue marble

marta [7]

Answer=10%

15+2+3=20
2 of which are blue.
Put it over 100, 20x5=100 so 2x5=10

4 0

3 years ago

Read 2 more answers

Javier shared his post with 4 friends, who each shared it with 4 more friends. They continued sharing at the same rate

Fittoniya [83]

First, 4 people know the post

Then, those 4 people share it each with 4 people (4 * 4 = 16)

Then, each of those people share it with another 4 people (16 * 4 = 64)

And so on. the function is as simple as: 4^x (4 to the power of x)

4 0

3 years ago