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3 years ago

I could really use someone’s help on this !

Mathematics

1 answer:

ELEN [110]3 years ago

8 0

Answer:

(fg)(x) = 12x^3 + 9x^2 + 28x + 21

Third option

Step-by-step explanation:

(fg)(x) = (3x^2 + 7)(4x + 3)

(fg)(x) = = (3x^2)(4x) + (3x^2)(3) + (7)(4x) + (7)(3)

(fg)(x) = 12x^3 + 9x^2 + 28x + 21

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3 years ago

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3 years ago

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2x^2=4+6x<br> Show your work please

Furkat [3]

Answer: x = 3 - sqrt 17 / 2 , x = 3 + sqrt 17 / 2

Step-by-step explanation:

2x^2 = 4 + 6x

divide both sides by 2

x^2 = 2 + 3x

move expression to the left

x^2 - 2 - 3x = 0

reorder the terms

x^2 - 3x - 2 = 0

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x = - (-3) +- sqrt (-3)^2 - 4 x (-2) / 2 x 1

calculate

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2 years ago

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Daniel [21]

Answer:

A) 1 : 4

B) 1 : 2

C) Base of M = 10 units

Step-by-step explanation:

The ratio of the area of triangle M to triangle N

$\frac {40}{160}= \frac{1}{4} = 1 : 4$

The ratio of the side lengths of triangle M to triangle N

$\sqrt{ \frac {40}{160}} = \sqrt{\frac{1}{4}} \\\\={\frac{1}{2}} \\\\=1 : 2$

C) Let the base of triangle M be b units.

$\sqrt{ \frac {40}{160}} = \frac{b}{20}\\\\\frac{1}{2}= \frac{b}{20}\\\\2b = 20\\\\b = \frac{20}{2} \\\\b = 10$

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2 years ago