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jasenka [17]
3 years ago
13

Solve 7x+y=50 4x+y=23 simultaneously

Mathematics
2 answers:
Aloiza [94]3 years ago
6 0

<em>so</em><em> </em><em>the</em><em> </em><em>valu</em><em>e</em><em> </em><em>of</em><em> </em><em>x</em><em> </em><em>is</em><em> </em><em>9</em><em> </em><em>and</em><em> </em><em>y</em><em> </em><em>is</em><em> </em><em>-</em><em>1</em><em>3</em><em>.</em>

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>

Cloud [144]3 years ago
4 0

Answer:

x = 9 and  y = -13

Step-by-step explanation:

7x + y =50.... eq 1

4x + y =23....eq 2

Subtract eq 2 from eq 1

7x + y = 50

-

4x + y = 23

This becomes;

7x - 4x + y - y= 50 -23

3x = 27

Divide both sides by the coefficient of x; 3

x = 9

Slot in the value of x in eq 1

7 (9) + y = 50

63 + y = 50

Subtract 63 from both sides

63 - 63 + y = 50 - 63

y = -13

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3 years ago
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If a=[-2 -4 2 5 1 5 -1 -3 -4] and b=[2 3 -5 5 -4 2 -1 -1 3] find ba
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The product of A and B matrix will be option D; BA = \left[\begin{array}{ccc}16&10&39\\-32&-30&-18\\-6&-6&-19\end{array}\right].

<h3>What is the multiplication of matrix?</h3>

If A = \left[\begin{array}{ccc}-2&-4&2\\5&1&5\\-1&-3&-4\end{array}\right]and B = \left[\begin{array}{ccc}2&3&-5\\5&-4&2\\-1&-1&3\end{array}\right]

then,

BA = \left[\begin{array}{ccc}2&3&-5\\5&-4&2\\-1&-1&3\end{array}\right] \left[\begin{array}{ccc}-2&-4&2\\5&1&5\\-1&-3&-4\end{array}\right]

BA = \left[\begin{array}{ccc}16&10&39\\-32&-30&-18\\-6&-6&-19\end{array}\right]

Hence, the product of A and B matrix will be option D; BA = \left[\begin{array}{ccc}16&10&39\\-32&-30&-18\\-6&-6&-19\end{array}\right].

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1 year ago
On a single roll of two number cubes, what is the probability of rolling doubles given that the sum is 6
dexar [7]

Answer:

1/6

Step-by-step explanation:

We can make a Punnett square to find number of favourable outcome

so

            cube1

         +

cube2    1          2          3        4          5         6

1            2         3           4        5          6        7      

2            3         4           5        6          7         8    

3            4          5         6        7         8         9

4           5          6          7         8         9         10

5         6           7          8         9        10         11

6           7           8          9         10        11         12

The probability of rolling doubles given that the sum is 6

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 6 / 36

  1 / 6

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