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2 years ago

280 miles in 4 hours 816 miles in 12 hours how are the ratios set up

Mathematics

1 answer:

nirvana33 [79]2 years ago

7 0

Answer:

180:4 and 816:12

Step-by-step explanation:

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What is the expression (x+1)(x2+3x+2) as a polynomial in standard form?

andrezito [222]

Step-by-step explanation:

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3 years ago

How to find matrics M

makkiz [27]

$\left[\begin{array}{ccc}9&7\\-4&2\end{array}\right] -4M=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\qquad(*) \\\\M=\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]\to4M=\left[\begin{array}{ccc}4a&4b\\4c&4d\end{array}\right]$

$(*)\qquad\left[\begin{array}{ccc}9&7\\-4&2\end{array}\right] -\left[\begin{array}{ccc}4a&4b\\4c&4d\end{array}\right]=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\\\\\left[\begin{array}{ccc}9-4a&7-4b\\-4-4c&2-4d\end{array}\right]=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\\.\qquad\qquad\qquad\qquad\ \ \ \Downarrow\\(_{11})\qquad9-4a=-3\ \ \ |-9\\-4a=-12\ \ \ \ |:(-4)\\a=3\\\\(_{12})\qquad7-4b=3\ \ \ \ |-7\\-4b=-4\ \ \ \ |:(-4)\\b=1$

$(_{21})\qquad-4-4c=4\ \ \ \ |+4\\-4c=8\ \ \ \ |:(-4)\\c=-2\\\\(_{22})\qquad2-4d=-18\ \ \ \ |-2\\-4d=-20\ \ \ \ \ |:(-4)\\d=5\\\\Answer:\ A.\ M=\left[\begin{array}{ccc}3&1\\-2&5\end{array}\right]$

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4 years ago

PLEASE HELP IMPORTANT MATH

aksik [14]

Answer:

The answer to your problem is b because if she wants to spend 20 minutes on the piano and she has 50 minutes until dinner than she would have 30 minutes on the computer.

Step-by-step explanation:

8 0

3 years ago

Solve: What is 4^2-5x2^3

e-lub [12.9K]

Not Sure if this is correct but 4^2-5x2^3 = 16-40x

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3 years ago

Read 2 more answers

Calculate the amount of property tax Alice Brown owes on her home, which has an assessed value of $90,000. The tax rate in her c

jenyasd209 [6]

Answer:

$2,790

Step-by-step explanation:

This is the concept of commercial arithmetic, the amount of tax calculated from $90,000 will be:

Rate*value

=31/1000*90000

=$2,790

the answer is $2,790

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2 years ago