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3 years ago

WHAT IS THISDSSSSSSSSSSSSSSSSSSS

Mathematics

1 answer:

MaRussiya [10]3 years ago

8 0

Answer:

Step-by-step explanation:

Yes, it is. The set of rational numbers is closed for all the four operations, so x+y, x-y, x*y and x/y are rational too. And it is easy to demonstrate. A rational number can be expressed as a fraction of two integers. So, x can be expressed as a/b and y as c/d. Hence x+y = a/b + c/d = (ad+bc)/bd, which, as fraction of two integers, is rational.

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(3-20i)-(14+6i)-(8-2i)

ollegr [7]

Because there are parentheses we distribute the negative signs:

3 - 20i + (-14) - 6i + (-8) + 2i

Next combine like terms:

3 + (-14) + (-8) and -20i - 6i + 2i

-19 -24i

8 0

3 years ago

in the school library there are 4850 Hindi and English books if the Hindi books are 42% find the number of English books in the

Marina CMI [18]

Answer:

2813 English books

Step-by-step explanation:

Hindi books are 42% of 4850

42 ÷ 100 = 0.42

0.42 × 4850 = 2037 Hindi books

number of English books = total number of Hindi and English books - number of hindi books

4850 - 2037 = 2813 English books

6 0

2 years ago

Please help with best explained answer

KIM [24]

Answer:

x = 25 B = 65˙ C = 50˙

Step-by-step explanation:

Triangle Sum- All three angles in a triangle add up to 180˙

65 + (3x - 10) + (2x) = 180

65 - 10 +3x + 2x = 180 Combine like terms

55 + 5x = 180 Move the 55 over to combine w/180.

- 55 -55

5x = 125 Divide by 5

5 5

x = 25 Answer

B C

(3x - 10) (2x)

(3*25 - 10) (2* 25)

65˙ 50˙

8 0

3 years ago

The range of the function

Rus_ich [418]

The range of this function is all real numbers. When it is a linear function it can reach negative and positive infinity.

4 0

3 years ago

Find the size of the angle BAC in the following triangle:

slamgirl [31]

Answer:

Step-by-step explanation:

Sin A=5/8=0.625

$A=sin^{-1} (0.625) \approx 36.68 ^\circ \\\approx 36.7^\circ\\\approx 37^\circ$

4 0

4 years ago

Read 2 more answers