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lianna [129]
3 years ago
5

NEED ANSWER ASAP!!!!

Mathematics
2 answers:
Zanzabum3 years ago
8 0

Answer:

The correct answer is first option

| -6   7  |

| 17   3  |

Step-by-step explanation:

It is given two  2x2 matrices we have to find the difference ,

| -4  8   |   -  | 2     1  |

| 3   12 |       |-14  15 |

To find the difference

| -4  8   |   -  | 2     1  |   =   | (-4 -2)         (8 - 1)     |

| 3   12 |       |-14  15 |       |  (3 - -14)      (12 - 15) |

 =    | -6   7  |

       | 17   3  |

Therefore the correct answer is first option

lesya692 [45]3 years ago
7 0

Answer:

1st option

Step-by-step explanation:

To find the difference of the given matrices, we just need to subtract the corresponding elements of the two matrices as shown below:

\left[\begin{array}{cc}-4&8\\3&12\end{array}\right] -\left[\begin{array}{cc}2&1\\-14&15\end{array}\right] \\\\ \\ =\left[\begin{array}{cc}-4-2&8-1\\3-(-14)&12-15\end{array}\right]\\\\ \\ =\left[\begin{array}{cc}-6&7\\17&-3\end{array}\right]

Thus, 1st option gives the correct answer

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Need help asap plss.
yanalaym [24]

Answer:

EF = 20 cm

Step-by-step explanation:

Here, we want to find the length of EF

To do this, we use the principle of similar triangles

The similar triangles we are considering here will be ;

FEA and FBD

when two triangles are similar, the ratio of their corresponding sides are equal

Let us calculate DC first

we can use Pythagoras’ theorem here and it is that the square of the hypotenuse equals the sum of the square of the two other sides

Using the triangle EDC

15^2 = 12^2 + DC^2

DC^2 = 225-144

DC^2 = 81

DC = 9

So the entire length of BD is 9 + 12 = 21 cm

Thus, we have it that;

Let EF be x

so DF = 15 + x

Hence;

BD/DF = AE/EF

21/15+x = 12/x

21x = 12(15 + x)

21x = 180 + 12x

21x-12x = 180

9x = 180

x = 180/9

x = 20 cm

EF = 20 cm

6 0
3 years ago
SOLVE. (5n)÷(30m)+(2m+4n)÷(30m)
Andru [333]
Note, since both factors have the same denominator, we can add the numerators together.

Numerator :

5n + (2m + 4n) = 5n + 2m + 4n = 9n + 2m

Denominator :

30m

Thus,

= (9n + 2m) / 30m
6 0
3 years ago
Read 2 more answers
What is the volume of a sphere that has a 12m diameter?
lesya [120]
Volume of Sphere = (4/3)*(pi)*(r^3)
 
                            r = (D/2) = 6 m
                        
                              =<span>(4/3)*(pi)*((6^3)

                              = 904.7786.. m^3
I hope this helps.</span>
5 0
3 years ago
NEED HELP ON THIS QUESTION
Tom [10]
Answer: 288

Workings : 16 x 12 =192 (for bottom rectangle bit) 12x 16 =192 then divide 192 by 2 =96 add them together and its 288
3 0
3 years ago
Tangerine trees yield 50 pounds of fruit per acre and grapefruit trees yield 75 pounds of fruit per acre. John's orchard produce
Ipatiy [6.2K]
No, it is not possible
7 0
3 years ago
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