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11 months ago

Standard form. (x+8)(x−6)

Mathematics

2 answers:

Natasha2012 [34]11 months ago

7 0

Answer:

x^2-2x-48

Step-by-step explanation:

FOIL

Firsts = x*x = x^2

outside = x*-6 = -6x

inside = 8*x = 8x

lasts = 8*-6 = -48

add all together x^2-6x+8x-48 = x^2-2x-48

vovikov84 [41]11 months ago

4 0

Answer:

x² + 2x - 48

Step-by-step explanation:

( x + 8 ) ( x - 6 )

= x ( x - 6 ) + 8 ( x - 6 )

= x*x - 6*x + 8*x + 8*( - 6 )

= x² - 6x + 8x - 48

= x² + 2x - 48

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2 years ago

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Step2247 [10]

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Step-by-step explanation:

To solve this problem we need to be familiar with the formula for the surface area of a cone:

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$r = \frac{d}{2}\\r = \frac{18}{2}\\r = 9 cm$

To calculate the height of the cone, we must use the Pythagorean Theorem:

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$C^2 = A^2 + B^2\\24^2 = 9^2 + B^2\\B^2 = 24^2 - 9^2\\B = \sqrt{24^2 - 9^2}\\B = \sqrt{576 - 81}\\B = \sqrt{495}\\B \approx 22.25$

Now we can plug into our original formula:

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3 years ago

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