SOLUTION: In the 7th grade completing Algebra Teached by: Ms. Haskins in Deer Park MIddle Magnet School In class we are learning about "Function Notation". Ms. Haskins stated that the

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Question 81273This question is from textbook Glencoe Mathematcs Algebra 1
: In the 7th grade completing Algebra
Teached by: Ms. Haskins in Deer Park MIddle Magnet School

In class we are learning about "Function Notation". Ms. Haskins stated that the most common variables use are f, g, or h am i right? The example she used during class to help us develop what she was teaching was the following:
equation: y=+3x-6 function notation: f%28x%29=+3x-6
to solve this function notation we substituted 2 in for x so it became
f%282%29=+3%282%29-6
6-6
f%282%29=+0
On page 230 in my Algebra 1 textbook number 38 I was have some issues with the question
The main Question States "If f%28x%29=+3x%2B7 and g%28x%29=+x%5E2-2x"
Number 38 states: g%282c%29 I tried to do:
g%282c%29=+2c%5E2-2%282C%29 what I am not understanding is how do you solve the problem if you don't know which opertion to start with? All i am asking is that you help me with my math homework so i can pass ALgebra 1.
Thank You for viewing my problem and helping me resolve it! i really do appreciate your time.
- a Deer Park Middle Magnet Student
- Sierah Sasso 7th grader This question is from textbook Glencoe Mathematcs Algebra 1

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
You are right f, g, and h are used for function notation (think of "f" for function). So f(x), g(x), and h(x) are functions. So if you have

g%28x%29=x%5E2-2x

and they want you to find g%282c%29 you simply plug 2c in for x

g%282c%29=%282c%29%5E2-2%282c%29

To figure out which operation you perform, we must remember the order of operations. The common mnemonic is PEMDAS where it stands for:
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction


According to this order, multiplication has precedence over addition (you would perform multiplication first before addition). So this means we evaluate the exponent first

g%282c%29=4c%5E2-2%282c%29 Square 2c to get 2%5E2%2Ac%5E2=4c%5E2 note: you are squaring the entire term 2c. So 2 is squared also

Now multiply

g%282c%29=4c%5E2-4c Multiply 2 and 2c to get 2%2A2c=4c

So g(2c) evaluates to

g%282c%29=4c%5E2-4c