Friday

August 29, 2014

August 29, 2014

Posted by **johnica** on Monday, February 22, 2010 at 11:52pm.

1. f(a)

2. f(3a)

3. f(a+b)

4. f(x+7)

5. f(5x+3)

6. g(f(x))

- algebra -
**MathMate**, Tuesday, February 23, 2010 at 8:37amThe function notation of f(x)=2x²-4 means that the letter "x" on each side of the equal sign takes on the same value. So

f(3) = 2(3)²-4 = 18-4 = 14

f(a) = 2(a)²-4 = 2a²-4

f(b+c) = 2(b+c)²-4 = 2b + 2c -4

etc.

since g(x)=5x+3,

f(g(x)) = f(5x+3) = 2(5x+3)² - 4

Expand the expression on the right hand side to get the final answer.

**Related Questions**

Algebra 1 - which cannot be represented by a linear function? A. The area of a ...

algebra - If the price from the sale of x-units is given by p=100x-x^2, the ...

algebra - given that sin (2x+30)=cos(x-15).determine the value of x given x is ...

Algebra can you give me direction - Graph the line through the given point and ...

Algebra - Find an equation of the line having the given slope and containing the...

Algebra - find an equation of the line having the given slope and containing the...

algebra - Find an equation of the line having the given slope and containing the...

algebra - Find an equation of the line having the given slope and the given ...

algebra - write the equation of a line parallel to the given line but passing ...

Algebra II - Given x(x) = 2x^3 - 6x^2 + 8 Rewrite the given equatin in factored ...