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Mariulka [41]
3 years ago
10

Lara chose a square number. She rounds it to the nearest hundred. Her answer is 200. What are all the possible square number she

could have chosen?
Mathematics
1 answer:
gogolik [260]3 years ago
4 0
Your answer is going to be 20
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Jack brought a keyboard priced at $183.60 the sales tax was found by multiplying the price of the keyboard by 0.05 what was the
blondinia [14]

Answer:

192.78‬

Step-by-step explanation:

maybe just use a calculator?????

5 0
3 years ago
It's really important, please help
slavikrds [6]

<em>The question isn't complete. This is just part of the question</em>

<em>So please send the whole question together.</em>

5 0
2 years ago
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Let g' be the group of real matricies of the form [1 x 0 1]. Is the map that sends x to this matrix an isomorphism?
aliina [53]

Yes. Conceptually, all the matrices in the group have the same structure, except for the variable component x. So, each matrix is identified by its top-right coefficient, since the other three entries remain constant.

However, let's prove in a more formal way that

\phi:\ \mathbb{R} \to G,\quad \phi(x) = \left[\begin{array}{cc}1&x\\0&1\end{array}\right]

is an isomorphism.

First of all, it is injective: suppose x \neq y. Then, you trivially have \phi(x) \neq \phi(y), because they are two different matrices:

\phi(x) = \left[\begin{array}{cc}1&x\\0&1\end{array}\right],\quad \phi(y) = \left[\begin{array}{cc}1&y\\0&1\end{array}\right]

Secondly, it is trivially surjective: the matrix

\phi(x) = \left[\begin{array}{cc}1&x\\0&1\end{array}\right]

is clearly the image of the real number x.

Finally, \phi and its inverse are both homomorphisms: if we consider the usual product between matrices to be the operation for the group G and the real numbers to be an additive group, we have

\phi (x+y) = \left[\begin{array}{cc}1&x+y\\0&1\end{array}\right] = \left[\begin{array}{cc}1&x\\0&1\end{array}\right] \cdot \left[\begin{array}{cc}1&y\\0&1\end{array}\right] = \phi(x) \cdot \phi(y)

8 0
3 years ago
3 ( x - 1/4 ) = 13/6
riadik2000 [5.3K]

Answer:

x = 35/36

Step-by-step explanation:

3(x-1/4) = 13/6       Distribute

3x-3/4=13/6          Add 3/4 on both sides

3x = 35/12            Divide by 3 on both sides

x = 35/36

8 0
2 years ago
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I DON'T KNOW WHAT TO DO WITH THIS. HELP
mixas84 [53]
Ok, so since she spent $15 each week for 10 weeks, she spent a total of $150 over those 10 weeks. The best approach I would use for this is cross multiplication. The total percentage of Books and music would be 35% out of 100% because 10+25=35. The answer is b, 50.

Hope this helps :)
6 0
3 years ago
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