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alexdok [17]
3 years ago
9

What is 4.345 x 10^5 in standard form?

Mathematics
1 answer:
zalisa [80]3 years ago
3 0

Answer:

Choice D.)   434,500

Step-by-step explanation:

What is 4.345 x 10^5 in standard form?

4.345 x 10^5 = 4.345 *  100,000

multiply it out:

4.345 x 10^5 = 434,500

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Solve the system by using a matrix equation
Sergeu [11.5K]

Answer:

Option A is correct (17,11).

Step-by-step explanation:

6x - 9y = 3

3x - 4y =7

it can be represented in matrix form as\left[\begin{array}{cc}6&-9\\3&4\end{array}\right] \left[\begin{array}{c}x\\y\end{array}\right] = \left[\begin{array}{c}3\\7\end{array}\right]

A= \left[\begin{array}{cc}6&-9\\3&4\end{array}\right]

X= \left[\begin{array}{c}x\\y\end{array}\right]

B= \left[\begin{array}{c}3\\7\end{array}\right]

i.e, AX=B

or X= A⁻¹ B

A⁻¹ = 1/|A| * Adj A

determinant of A = |A|= (6*-4) - (-9*3)

                                    = (-24)-(-27)

                                    = (-24) + 27 = 3

so, |A| = 3

Adj A=  \left[\begin{array}{cc}-4&9\\-3&6\end{array}\right]

A⁻¹ =  \left[\begin{array}{cc}-4&9\\-3&6\end{array}\right]/3

A⁻¹ =  \left[\begin{array}{cc}-4/3&3\\-1&2\end{array}\right]

X= A⁻¹ B

X=  \left[\begin{array}{cc}-4/3&3\\-1&2\end{array}\right] *\left[\begin{array}{c}3\\7\end{array}\right]

X= \left[\begin{array}{c}(-4/3*3) + (3*7)\\(-1*3) + (2*7)\end{array}\right]

X= \left[\begin{array}{c}-4+21\\-3+14\end{array}\right]

X= \left[\begin{array}{c}17\\11\end{array}\right]

x= 17, y= 11

solution set= (17,11).

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Answer:

(4, 0) and (5, 0)

Step-by-step explanation:

Given

See attachment for graph

Required

The x intercepts

This is the point where y = 0

From the graph, we have the following as the x-intercepts:

(x_1,y_1) = (4,0)

(x_2,y_2) = (5,0)

Because the curve crosses the x-axis at the above points

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Suppose that you own a store that sells a particular stove for $1,000. You purchase the stoves from the distributor for $800 eac
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Answer

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Explanation  

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3 years ago
Simplify x + 6.2 + 8.5.<br><br> 6.2x + 8.5<br> x + 14.7<br> 14.7x
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Answer:

x + 14.7

Step-by-step explanation:

x + 6.2 + 8.5.

Combine like terms

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I think it is 30%. Remember I am not sure
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