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3 years ago

Please Help ............................................

Mathematics

1 answer:

liq [111]3 years ago

4 0

Not a real number because a negative number is imaginary

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On a cold night in Ohio, the temperature was –7 degrees Fahrenheit. By morning the next day, the temperature increased 15 degree

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Answer:

37 degrees Fahrenheit

Step-by-step explanation:

15 - -7 = 22

22 + -7 = 15

15 + 22 = 37

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Step-by-step explanation:

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3 years ago

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Kamila [148]

Answer:

$\large\boxed{(f\cdot g)(x)=2x^3+x^2-14x-7}$

Step-by-step explanation:

$(f\cdot g)(x)=f(x)\cdot g(x)\\\\f(x)=2x+1;\ g(x)=x^2-7\\\\(f\cdot g)(x)=(2x+1)(x^2-7)\qquad\text{use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(2x)(x^2)+(2x)(-7)+(1)(x^2)+(1)(-7)\\\\=2x^3-14x+x^2-7$

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