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3 years ago

HELP!!! PLZ !!!!!!!!!

Mathematics

2 answers:

nikklg [1K]3 years ago

7 0

Answer:

7.3125

Step-by-step explanation:

7 5/16 as a decimal is 7.3125

PLEASE DO MARK ME AS BRAINLIEST IF MY ANSWER IS HELPFUL ;) 

Ganezh [65]3 years ago

5 0

Answer:7.3125

Step-by-step explanation:

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First option is the correct option.

Step-by-step explanation:

$\frac{2x + 5}{ {x}^{2} - 3x } - \frac{3x + 5}{ {x}^{3} - 9x } - \frac{x + 1}{ {x}^{2} - 9 }$

Factor out X from the expression

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$\frac{(x + 3) \times (2x - 5) - (3x + 5) - x \times (x + 1)}{x(x - 3)(x + 3)}$

Multiply the parentheses

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When there is a (-) in front of an expression in parentheses, change the sign of each term in the expression

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Distribute -x through the parentheses

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Using ${a}^{2} - {b}^{2} = (a + b)(a - b)$ , simplify the product

$\frac{2 {x}^{2} + 5x + 6x + 15 - 3x - 5 - {x}^{2} - x}{x( {x}^{2} - 9)}$

Collect like terms

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Subtract the numbers

$\frac{ {x}^{2} + 7x + 10}{ x({x}^{2} - 9)}$

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$\frac{ {x}^{2} + 7x + 10}{ {x}^{3} - 9x}$

Write 7x as a sum

$\frac{ {x}^{2} + 5x +2x + 10 }{ {x}^{3} - 9x }$

Factor out X from the expression

$\frac{x(x + 5) + 2x + 10}{ {x}^{3} - 9x}$

Factor out 2 from the expression

$\frac{x( x + 5) + 2(x + 5)}{ {x}^{3} - 9x }$

Factor out x + 5 from the expression

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<h3>Lateral surface area of a cone</h3>

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Lateral area = πrl

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divide both sides by 2.4π

l = 19.2π / 2.4π

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learn more on cone here: brainly.com/question/27170515

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