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3 years ago

Can someone help me... I’m lost :/

Mathematics

1 answer:

elixir [45]3 years ago

3 0

The true statement is - The matrix is square.

Option: C.

Step-by-step explanation:

The given matrix is represented as the flight times between cities in hours.

The rows are cities of departure and the columns are city of arrival.

But any of the given statements doesn't relatable to the given matrix, except the given matrix is a square.

Any matrix can be considered as square when it has equal number of rows and columns.

i.e. A m by n matrix has m=n.

where m is the number of rows and n is the number of columns.

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If for sets A and B there exists a injective function but not bijective function from A to B then a) Cardinality of A is stricly

Setler [38]

No question asked? Maybe include all of the information given.

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3 years ago

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Helga [31]

Answer:

Step-by-step explanation:

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3 years ago

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Sec0 = -<img src="https://tex.z-dn.net/?f=%5Cfrac%7B13%7D%7B12%7D" id="TexFormula1" title="\frac{13}{12}" alt="\frac{13}{12}" al

enot [183]

Answer:

Solution given;

Sec θ=- $\frac{13}{12}$

cotθ< 0,

It lies in second quadrant.

where sin and cosec is positive.

Now

$\frac{1}{cosθ}=-\frac{13}{12}$

cosθ= $\frac{12}{13}$

$\frac{b}{h}$ = $\frac{12}{13}$

b=12

h=13

By using Pythagoras law

p= $\sqrt{13²-12²}=5$

Now

exact values of tan θ= $\frac{p}{b}$ = $\frac{5}{12}$

since it lies in II quadrant

tan θ=- $\frac{5}{12}$

and

sinθ= $\frac{p}{h}$ = $\frac{5}{13}$

since it lies in II quadrant

sin θ= $\frac{5}{13}$

8 0

3 years ago

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A shirt is on sale for 40% off. The sale price is $12. What was the original price? What was the amount of the discount?

kolbaska11 [484]

x = original price, or 100%

we know then that it original costs "x", which is the 100%, however is discounted by 40%, so the discounted price is really then 100% - 40% = 60%, and we know that that 60% is $12.

if 60% of the original price is $12, what is "x", the 100%?

$\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} x&100\\ 12&60 \end{array}\implies \cfrac{x}{12}=\cfrac{100}{60}\implies \cfrac{x}{12}=\cfrac{5}{3}\implies 3x=60 \\\\\\ x=\cfrac{60}{3}\implies x=20 ~\hfill \stackrel{\textit{amount of the discount}}{20-12\implies 8}\\ ~\hspace{34em}$

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4 years ago

Help~~~~~~~~~````````````````

kupik [55]

Answer:

112.98

Step-by-step explanation:

37.68/2π = 5.9969

5.9969²π = 112.98

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3 years ago

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