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Pepsi [2]
3 years ago
9

If f(x)=2x−3 and g(x)=4x+5, what is (f⋅g)(x)?

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
5 0

Answer:

(f⋅g)(x)=8x^2−2x−15

Step-by-step explanation:

To find the expression (f*g)(x), multiply f(x) into g(x) using the distribution property.

(f*g)(x) = (2x - 3)(4x + 5) = 8x² - 12x + 10x - 15 = 8x² - 2x - 15

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Answer:


Step-by-step explanation:

Let's draw the given information first for better understanding . Check the image attached.

We can use cosine rule to find the angles .

for angle A ,

Cos A =\frac{b^2+c^2-a^2}{2bc}

Cos A =\frac{20^2+12^2-15^2}{2*20*12}

Cos A =\frac{319}{480}

m∠A = 48.35 degrees

Similarly for angle B

Cos B =\frac{a^2+c^2-b^2}{2bc}

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Cos B =\frac{-31}{360}

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3 0
3 years ago
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katrin2010 [14]

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2 years ago
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amm1812
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------------
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