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melomori [17]
3 years ago
7

You select the letter A from the group. Without replacing the A, you select a second letter. Find P(not K).

Mathematics
1 answer:
marusya05 [52]3 years ago
8 0

Answer:

A. 6/7

Step-by-step explanation:

you remove the a so that there are only 7 letters left. if you count everything except the k and a there are 6 letters

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I believe it’s 10

Explanation : Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.
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Walks for 17.5 meters at a speed of 7 meters per minute. For how many minutes does it walk?
Alekssandra [29.7K]
Speed = distance / time

7 = 17.5 / t
t = 17.5 / 7
  =    2.5 minutes
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3 years ago
Solve the system by using a matrix equation (Picture provided)
Katyanochek1 [597]

Answer:

Option b is correct (8,13).

Step-by-step explanation:

7x - 4y = 4

10x - 6y =2

it can be represented in matrix form as\left[\begin{array}{cc}7&-4\\10&-6\end{array}\right] \left[\begin{array}{c}x\\y\end{array}\right] = \left[\begin{array}{c}4\\2\end{array}\right]

A= \left[\begin{array}{cc}7&-4\\10&-6\end{array}\right]

X= \left[\begin{array}{c}x\\y\end{array}\right]

B= \left[\begin{array}{c}4\\2\end{array}\right]

i.e, AX=B

or X= A⁻¹ B

A⁻¹ = 1/|A| * Adj A

determinant of A = |A|= (7*-6) - (-4*10)

                                    = (-42)-(-40)

                                    = (-42) + 40 = -2

so, |A| = -2

Adj A=  \left[\begin{array}{cc}-6&4\\-10&7\end{array}\right]

A⁻¹ =  \left[\begin{array}{cc}-6&4\\-10&7\end{array}\right]/ -2

A⁻¹ =  \left[\begin{array}{cc}3&-2\\5&-7/2\end{array}\right]

X= A⁻¹ B

X=  \left[\begin{array}{cc}3&-2\\5&-7/2\end{array}\right] *\left[\begin{array}{c}4\\2\end{array}\right]

X= \left[\begin{array}{c}(3*4) + (-2*2)\\(5*4) + (-7/2*2)\end{array}\right]

X= \left[\begin{array}{c}12-4\\20-7\end{array}\right]

X= \left[\begin{array}{c}8\\13\end{array}\right]

x= 8, y= 13

solution set= (8,13).

Option b is correct.

3 0
3 years ago
According to the graph what is the value of x when g(x)=4
Serhud [2]

Answer:

x=2

Step-by-step explanation:

we know that

according to the graph

when g(x)=4

the value of x=2

see the attached figure to better understand the problem

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7 x 1 = 7 shows the _______ property
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Step-by-step explanation:

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2 years ago
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