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2 years ago

You spin the spinner twice. Find the probability of the event. Spinning a 3 and then 4

Mathematics

1 answer:

olga nikolaevna [1]2 years ago

3 0

Answer:

The answer is 1/36

Step-by-step explanation:

each event has a 1/6 chance of happening so you multiply 1/6 by 1/6 and get 1/36

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Find x helpppppppppppp

lidiya [134]

$|2x - 1| = | - x - 2|$

Thus ;

$2x - 1 = - x - 2$

Add both sides x

$2x + x - 1 = - x + x - 2$

$3x - 1 = - 2$

Add both sides 1

$3x - 1 + 1 = - 2 + 1$

$3x = - 1$

Divide both sides by 3

$\frac{3x}{3} = \frac{ - 1}{3} \\$

$x = - \frac{1}{3} \\$

$2x - 1 = - ( - x - 2)$

$2x - 1 = x + 2$

Subtract both sides x

$2x - x - 1 = x - x + 2$

$x - 1 = 2$

Add both sides 1

$x - 1 + 1 = 2 + 1$

$x = 3$

There u go ...

3 0

2 years ago

How to find matrics M

makkiz [27]

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

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

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