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Vanyuwa [196]
2 years ago
8

2. If A and B are square matrices of the same order, then (A + B) (A - B) is equal to (a) A²– B² (b) A– BA – AB - B² (c) A² - B²

+ BA – AB (d) A² - BA +B+ AB​
Mathematics
1 answer:
Anastaziya [24]2 years ago
6 0

Correct option is C) A² - B² + BA – AB

Step-by-step explanation:

(A+B)(A−B)=A(A−B)+B(A−B).........because matrix product is distributive.

=A² + BA - AB - B²

And as matrix product is not commutative, so AB¦=¦BA

Hence option C is correct.

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mariarad [96]

Answer:

3.32ft

Step-by-step explanation:

The wire and the poles attached to the ground form a right triangle with the length of the wire being the hypotenuse.

Using Pythagoras Theorem:

Hypotenuse²=Adjacent²+Opposite²

6²=5²+x²

x²=36-25

x²=11

x=√11=3.32 ft.

The wires are attached 3.32 ft from the base of the pole on the ground

3 0
3 years ago
Read 2 more answers
7.9-3.47=please show me how to rewrite it vertically?
Lemur [1.5K]

Answer:

4.43

Step-by-step explanation:

7.90

- 3.47

__________

4. 4 3

I couldn't regroup but of you cross out 0 and put 10, 10-7= 3

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4 0
3 years ago
A spinner is numbered from 1 through 12 with each number equally likely to occur.
katovenus [111]

Answer: EX:There are 10 numbers from 1 - 10

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secondly get the numbers greater than 7 are (8,9,10)

total = 4 numbers

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hope it helps

Step-by-step explanation:

4 0
2 years ago
There are 8 ounces in 1 cup. The table shows some conversions between ounces and cups. Which equation describes how to convert b
ipn [44]

Answer:

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7 0
2 years ago
The following table shows the estimated populations and annual growth rates for four countries in the year 2000. Find the expect
Softa [21]

Answer:

For Australia: 22,044,350

For China: 1,545,744,200

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Step-by-step explanation:

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Therefore, the population in the year 2025 will be  

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For China: Population in 2000 is 1,261,832,000 and it is increasing steadily at a rate of 0.9% per year.

Therefore, the population in the year 2025 will be  

1261832000[1+\frac{0.9 \times 25}{100} ]= 1,545,744,200 (Answer)

For Mexico: Population in 2000 is 100,350,000 and it is increasing steadily at a rate of 1.8% per year.

Therefore, the population in the year 2025 will be

100350000[1+\frac{1.8 \times 25}{100} ]= 145,507,500 (Answer)

For Zaire: Population in 2000 is 51,965,000 and it is increasing steadily at a rate of 3.1% per year.

Therefore, the population in the year 2025 will be

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5 0
3 years ago
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