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3 years ago

U need help ASP .f(x)=1-3X and g (x)=x+4 calculate gf(-2)

Mathematics

1 answer:

IgorC [24]3 years ago

7 0

Answer:

gf (-2) = 11

Step-by-step explanation:

$f(x) = 1 - 3x \\ g(x) = x + 4 \\ gf( - 2) = ..$

$gf = .. \\ g(1 - 3x) \\ = 1 - 3x + 4 \\ = - 3x + 5 \\ gf = - 3x + 5$

$gf( - 2) = - 3( - 2) + 5 \\ = 6 + 5 = 11$

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2 years ago

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WARRIOR [948]

Answer:

The answer is D.

Step-by-step explanation:

We have to apply Discriminant Law. When a quadratic equation, ax² + bx + c = 0 has equal roots so the discriminant will be 0. Then, you have to substitute the values into the formula :

$D = {b}^{2} - 4ac$

$let \: D = 0 ,a = 2,b = k,c = k$

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$k = 0$

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3 years ago

U need help ASP .f(x)=1-3X and g (x)=x+4 calculate gf(-2)​

U need help ASP .f(x)=1-3X and g (x)=x+4 calculate gf(-2)