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kondaur [170]
3 years ago
10

The world record for the fastest typing speed is 212 words per minute. How many words per second is this? Round to the nearest t

enth. Show your work
Mathematics
2 answers:
natka813 [3]3 years ago
7 0

Answer:

3.5 words per second

Step-by-step explanation:

There are 60 seconds in a minute. To find the words per seconds, We will need to divide the words per minutes of 212 by 60. Let x equal this number.

x=212/60

Do the division

x=3.5333....

This rounds down since 3 rounds down

x=3.5

They type at 3.5 words per second


taurus [48]3 years ago
6 0

Answer:

3.5

Step-by-step explanation:

212 words / 60 seconds in a minute = 3.53 repeating


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Answer:

dim L = dim U = \frac{n(n+1)}{2}

Step-by-step explanation:

We can do it only for the lower-triangular matrices, the case of the upper-triangular matrices is similar. We might caracterice nxn the lower-triangular matrices, as the nxn matrices A=(a_{ij}) such that the entry a_{ij}=0 if i<j.

Now let A=(a_{ij}) and B=(b_{ij}) be two lower triangular matrices, now if

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then the entry c_{ij} of C is equal to

c_{ij}=a_{ij}+\lambda b_{ij}

Now, if i<j, it must hold that a_{ij}=0 \quad \text{and} \quad b_{ij}=0. Therefore, if this is the case we must have that c_{ij}=0 and so we get that C is also a lower triangular matrix. This showa that L is closed under sum and scalar multiplcation, hence it is a linear subspace.

To find the dimension, note that all the entries of a lower-triangular matrix over the diagonal must be equal to zero. However, each entry of the matrix under the diagonal and in the diagonal might be any element of \mathbb{F}, any entry that can be choosen add up to the dimension of L, we n such elemnts for the first column, (n-1) for the second column, (n-2) for the third column etc.... Therefore,

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3 years ago
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2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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