1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Doss [256]
3 years ago
11

HELP MEEEE How do you add and subtract functions?

Mathematics
2 answers:
nata0808 [166]3 years ago
5 0

Answer:

To add or subtract functions, just add or subtract the values at each point where it makes sense. If the functions are given by formulas, you can just add or subtract the formulas (it doesn't matter whether you plug in values before or after).

Step-by-step explanation:

Lisa [10]3 years ago
4 0

Here's an example of adding two functions

f(x) = 5x^2+7x+10\\\\g(x) = 3x^2-2x+4\\\\f(x)+g(x) = (5x^2+7x+10)+(3x^2-2x+4)\\\\f(x)+g(x) = (5x^2+3x^2)+(7x-2x)+(10+4)\\\\f(x)+g(x) = 8x^2+5x+14\\\\

We basically add the expressions like normal. There are 3 pairs of like terms

  • 5x^2 \text{ and } 3x^2 which combine to 8x^2
  • 7x \text{ and } -2x which combine to 5x
  • 10 \text{ and } 4 which combine to 14

==========================================================

Now let's say we wanted to subtract those two functions.

f(x) = 5x^2+7x+10\\\\g(x) = 3x^2-2x+4\\\\f(x)-g(x) = (5x^2+7x+10)-(3x^2-2x+4)\\\\f(x)-g(x) = 5x^2+7x+10-3x^2+2x-4\\\\f(x)-g(x) = (5x^2-3x^2)+(7x+2x)+(10-4)\\\\f(x)-g(x) = 2x^2+9x+6\\\\

Notice in the fourth line, the negative distributes to each term inside the parenthesis. This is because we're subtracting off 3x^2 and also subtracting off -2x (i.e. adding 2x) and also subtracting off 4 all from f(x).

You might be interested in
Your portfolio has grown from $2500 to $3800 what is the percent of growth rate
Romashka-Z-Leto [24]

Answer:

52%

Step-by-step explanation:

7 0
3 years ago
3(2-3+4) <br><br>math problem help me to slove​
mel-nik [20]

Answer:

9 is the answer

Step-by-step explanation:

  • 3(2-3+4)
  • 3(6-3)
  • 3(3)
  • 9
6 0
3 years ago
Read 2 more answers
If the absolute value of x is 4, what is the value of x?
natima [27]
The absolute value of x is 4
4 0
3 years ago
Joe paid $10 for 8 batteries. Which graph represents the cost of the batteries he bought?
kolbaska11 [484]

Answer:

the 1st graph that has a point of (4,5)

8 0
3 years ago
-3+(-6) is ___ units from -3 in the positive or negative direction.
Lisa [10]

Answer:

-3+(-6) = -9

Step-by-step explanation:

a negative 3 plus another negative 6 is a negative 9. Is just like if you borrow $3 from your friend and borrow $9 from another friend. That means you own two of your friends a total of $9. This can be mathematically illustrate as: -3 + (-6)= -9

3 0
3 years ago
Other questions:
  • A car depreciated $1500 each year it was owned and driven. What type of depreciation is this?
    10·2 answers
  • There were 10 horses are involved in this year’s preakness stakes. suppose you are betting to correctly pick top three finishers
    8·1 answer
  • Finding the length of NM?
    11·1 answer
  • As shown on the diagram, a regular pyramid has a square base whose side measures 6 inches. If the altitude of the pyramid measur
    11·1 answer
  • I need help please ASAP?!!!!
    5·1 answer
  • Finbar invested money in a transportation stock whose growth is modeled by the function f(x) = 0.01(2)x, where x represents numb
    13·1 answer
  • −6x + 5y = 16x + 4y = −10
    9·2 answers
  • Can u pls help me with this question asap ​
    13·1 answer
  • Please help me! I don’t have much longer till this assignment closes!
    11·1 answer
  • Find the area of the trapezoid 3cm 3cm 4cm 1cm
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!