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evablogger [386]
3 years ago
12

Line segments PQ and RS are parallel. Find the unknown length

Mathematics
1 answer:
Debora [2.8K]3 years ago
7 0
It is 120 because you do proportions. 540x=64800 and divide both sides by 540 and x=120
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The graph of a quadratic function in shown below.
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Answer:

NOT true:

A, C, D

Step-by-step explanation:

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A new microwave that normally sells for $897.00 is on sale for 15% off. If the sales tax is 7.5%, then how much will you pay in
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1 year ago
What is the distance between (2,-6) and (-4,3)
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2 years ago
Please help me this is from khan academy :(((
Dmitrij [34]

Answer:

y=1.4x+6.8

Step-by-step explanation:

(-2;4) (-7;-3)

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I already know k and b so I can write an equation.

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6 0
3 years ago
Determine if the matrix below is invertible. Use as few calculations as possible. Justify your answer. [Start 4 By 4 Matrix 1st
Len [333]

Answer:

Yes, it is invertible

Step-by-step explanation:

We need to find in the matrix determinant is different from zero, since iif it is, that the matrix is invertible.

Let's use co-factor expansion to find the determinant of this 4x4 matrix, using the column that has more zeroes in it as the co-factor, so we reduce the number of determinant calculations for the obtained sub-matrices.We pick the first column for that since it has three zeros!

Then the determinant of this matrix becomes:

4\,*Det\left[\begin{array}{ccc}1&4&6\\0&3&8\\0&0&1\end{array}\right] +0+0+0

And the determinant of these 3x3 matrix is very simple because most of the cross multiplications render zero:

Det\left[\begin{array}{ccc}1&4&6\\0&3&8\\0&0&1\end{array}\right] =1 \,(3\,*\,1-0)+4\,(0-0)+6\,(0-0)=3

Therefore, the Det of the initial matrix is : 4 * 3 = 12

and then the matrix is invertible

4 0
2 years ago
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