Please help!!!.......thx

Mathematics

1 answer:

trasher [3.6K]3 years ago

3 0

Step-by-step explanation:

sin and tan are the only ones with p positive valued

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If the diameter is 1 what is the radius, circumference, and the area

mezya [45]

The radius would be .5.

When the diameter of a circle is 1, the circle's circumference is equal to pi.

The area would be .79

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3 years ago

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- 7/4 = 2/5t<br><br> Solve for t please:<br><br> ___

jasenka [17]

First, you had to switch sides of equation.

And it gave us ⇒ $\frac{2}{5}t=-\frac{7}{4}$

Then multiply by five from both sides of equation form.

And it gave us ⇒ $5*\frac{2}{5}t=5(-\frac{7}{4})$

Simplify.

And it gave us ⇒ $2t=-\frac{35}{4}$

Next, divide by two from both sides of equation form.

And it gave us ⇒ $\frac{2t}{2}=-\frac{35}{4/2}$

Finally, simplify.

And it gave us ⇒ $t=-\frac{35}{8}$

Final answer: ⇒ $\boxed{t=-35/8}$

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3 years ago

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How to find matrics M

makkiz [27]

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

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

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