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pogonyaev
2 years ago
8

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

Mathematics
1 answer:
Hitman42 [59]2 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

<h3>=  9x² - 1</h3>

20.  (7x² - 11 + 16x) + (5x - 3x² - 7)

=  7x² - 11 + 16x + 5x - 3x² - 7

<h3>=  4x² + 21x - 18</h3>

22.  (4x² - 12x - 10) - (2x² + x - 3)

=   4x² - 12x - 10 - 2x² - x + 3

<h3>=   2x² - 13x - 7</h3>

23.  (7x³ - 9x² - 14x) - (4x³ - 4 - x)

=  7x³ - 9x² - 14x - 4x³ + 4 + x

=  7x³ - 4x³  - 9x² - 14x + x + 4

<h3>=  3x³ - 9x² - 13x + 4</h3>

25. (9x² + 24x - 8) - (5x² + 3x + 10)

=  9x² + 24x - 8 - 5x² - 3x - 10

<h3>=  4x² + 21x  - 18</h3>

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

=  5x - 12x² + 9x³ - 5x³ - 6x + 3

<h3>=  4x³ - 12x² - x + 3</h3>

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

=   2x² - 1 + 3x³ + 5 - 13x - 11x²

<h3>=  3x³ - 9x² - 13x + 4</h3>

30.  (10x - x² + 8) + (5x² + 1 - 22x)

=   10x - x² + 8 + 5x² + 1 - 22x

<h3>=   4x² - 12x + 9</h3>

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Mohamed decided to track the number of leaves on the tree in his backyard each year. the first year, there were 500 leaves. each year thereafter, the number of leaves was 40% more than the year before. let f(n) be the number of leaves on the tree in Mohamed's backyard in the n^th year since he started tracking it. f is a sequence. what kind of sequence is it?

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