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3 years ago

SOMEONE, PLEASE HELP ME OUT!!!!!! WILL MARK BRAINLIEST

Mathematics

1 answer:

Hitman42 [59]3 years ago

6 0

Answer:

see below

Step-by-step explanation:

19. (4x + 8x² - 8) + (x² + 7 - 4x)

= 4x + 8x² - 8 + x² + 7 - 4x

= 8x² + x² + 4x - 4x -8 + 7

20. (7x² - 11 + 16x) + (5x - 3x² - 7)

= 7x² - 11 + 16x + 5x - 3x² - 7

22. (4x² - 12x - 10) - (2x² + x - 3)

= 4x² - 12x - 10 - 2x² - x + 3

23. (7x³ - 9x² - 14x) - (4x³ - 4 - x)

= 7x³ - 9x² - 14x - 4x³ + 4 + x

= 7x³ - 4x³ - 9x² - 14x + x + 4

25. (9x² + 24x - 8) - (5x² + 3x + 10)

= 9x² + 24x - 8 - 5x² - 3x - 10

26. (5x - 12x² + 9x³) - (5x³ + 6x - 3)

= 5x - 12x² + 9x³ - 5x³ - 6x + 3

28. (2x² - 1 + 3x³) + (5 - 13x - 11x²)

= 2x² - 1 + 3x³ + 5 - 13x - 11x²

30. (10x - x² + 8) + (5x² + 1 - 22x)

= 10x - x² + 8 + 5x² + 1 - 22x

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We know, Tan A = P/B
Here, Perpendicular = 24
Base = 7

We need to calculate Hypotenuse by Pythagoras Theorem,
H² = 24² + 7²
H² = 576 + 49
H = √625
H = 25

Now, we know, Cos A = B/H = 7/25

In short, Your Answer would be 7/25

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2 years ago

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Answer:

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Step-by-step explanation:

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4 years ago

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Help asap thank you!!!!!

viktelen [127]

Answer:

A = 120

C = 45

Step-by-step explanation:

(12x + 12) + 15 + (3x + 18) = 180

(12x + 3x) + (12 + 15 + 18) = 180

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15x = 180 - 45

15x = 135

x = 135/15

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3 years ago

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RoseWind [281]

Answer:

14 is the answer

Step-by-step explanation:

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