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3 years ago

15

2 < 17 ÷ e please help I don't know how to solve this

1 answer:

IceJOKER [234]3 years ago

7 0

I don't know either because I don't know what the e equals to

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A fair die is rolled, and then a coin with probability p of Heads is flipped as many times

Whitepunk [10]

If I remember correctly from last year, it’s C

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4 years ago

Calculate the angle between (2,2,4) and (2,-1,1). The result is a familiar angle, so the answer is to be given exactly.

andrew-mc [135]

Answer:

The angle between $(2,2,4)$ and $(2,-1,1)$ is 60º.

Step-by-step explanation:

From linear algebra, we can determine the angle between both vectors by definition of dot point:

$\cos \theta = \frac{\vec u\bullet \vec v}{\|\vec u\|\cdot \| \vec v\|}$ (1)

Where:

$\vec u$ , $\vec v$ - Vectors.

$\|\vec u\|$ , $\|\vec v\|$ - Norms of vectors.

$\theta$ - Angle between vectors, measured in sexagesimal degrees.

If we know that $\vec u = (2,2,4)$ and $\vec v = (2,-1,1)$ , then angle between vectors is:

$\|\vec u\| = \sqrt{\vec u\bullet \vec u}$ (2)

$\|\vec u\| = \sqrt{2^{2}+2^{2}+4^{2}}$

$\|\vec u\| \approx 4.899$

$\|\vec v\| = \sqrt{\vec v\bullet \vec v}$ (3)

$\|\vec v\| = \sqrt{2^{2}+(-1)^{2}+1^{2}}$

$\|\vec v\| \approx 2.450$

$\vec u \bullet \vec v = (2,2,4)\bullet (2,-1,1)$

$\vec u \bullet \vec v = 4-2+4$

$\vec u \bullet \vec v = 6$

$\cos \theta = \frac{6}{(4.899)\cdot (2.450)}$

$\cos \theta = 0.5$

$\theta = 60^{\circ}$

The angle between $(2,2,4)$ and $(2,-1,1)$ is 60º.

6 0

3 years ago

Which property is illustrated by the following statement 4.8 + k = k + 4.8

Kipish [7]

Step-by-step explanation:

Commutative property

Is illustrated by this statement

8 0

3 years ago

The table shows the ratio between the number of books ordered and their cost: Number of Books Cost (dollars) 7 14 8 16 9 18 Find

attashe74 [19]

14/7 = 2

16/8 = 2

18/9 = 2

This shows the cost of one book is $2

Multiply the number of books bought by 2 to get the cost:

1 x 2 = 2

2 x 2 = 4

3 x 2 = 6

Answer: (1,2) (2,4) (3,6)

Starting from the origin (0,0) for every 1 book bought ( x axis) move 2 more up than the previous total (y axis)

Using the 3 ordered pairs in the answer at x value 1 place a dot at y 2, then a dot at x2,y4 and again at x3,y6

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3 years ago

Read 2 more answers

Jack is putting a rectangular fence around his garden. The length of the garden is 1 1/4 yards. The width of the garden is 3 1/2

Advocard [28]

Jack will need 9.5 or 9 1/2 yards of fencing.

Perimeter since it says around.
(1.25+1.25)+(3.5+3.5)
2.5+7
9.5

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3 years ago