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
mylen [45]
3 years ago
13

PLZ HELP

Mathematics
1 answer:
lana [24]3 years ago
4 0

Answer:

Part A:

To find the total length of the two sides you want to add them together:

(3x^2-2x-1)+(9x+2x^2-2)= you want to combine all like terms

3x^2+2x^2=5x^2, you add your coefficients and keep the exponents the same

-2x+9x=7x, you would combine like terms

-1-2=-3, you would subtract according to Keep, Change, Change

You now have:

5x^2+7x-3= Sides A+B

5x^2+7x-3

Part B:

To find the length of the third side you want to take the perimeter of the triangle and subtract it from our answer in part A

(5x^3+4x^2-x-3)-(5x^2+7x-3)

When subtraction polynomials we want to change the subtraction sign to addition and change the signs of the other number to the opposite sign to prevent making mistakes from subtraction, so you're new equation will look like this:

(5x^3+4x^2-x-3)+(-5x^2-7x+3)

Now we add all like terms again

5x^3, doesn't combine with any others so we leave it the same

4x^2-5x^2=-x^2, subtract them but remember to keep the exponents the same

-x-7x=-8x, again subtract terms but keep variable

-3+3=0, they cancel out so we don't have to worry about putting anything for this one

So now we are left with

5x^3-x^2-8x as our length for the third side

Third side equals 5x^3-x^2-8x

Part C:

For part A we added to get the total of sides B and A

For part B we subtracted the total perimeter from the total lengths of B and A, to figure out what C equals

Hope this helps ;)

You might be interested in
Help me with my test
pychu [463]

Answer:

A

Step-by-step explanation:

5 0
3 years ago
Help me PLEASEEEeeee
Harlamova29_29 [7]

Answer:

y=-2x-2

Step-by-step explanation:

Just ask.

Hope this helped! :)

8 0
2 years ago
Add<br><br> -3/8 + 5/4<br><br> Simplify your answer. Type a fraction or an interger.
sdas [7]
Beautiful your answer is 7/8
7 0
3 years ago
Read 2 more answers
Which of the following shows a group of possible angles a triangle could have?
Delvig [45]

Answer:

C. 60 degrees, 60 degrees, 60 degrees

Step-by-step explanation:

The measures of interior angles of a triangle sum to 180°.

8 0
3 years ago
Is -8.56 a rational or irrational number?
PolarNik [594]
Its a rational number
5 0
3 years ago
Read 2 more answers
Other questions:
  • Describe what solving a trigonometric equation is.
    9·1 answer
  • find the root(s) of f (x) = (x + 5)3(x - 9)2(x + 1). 50 POINTS!!!!!!! -5 with multiplicity 3 5 with multiplicity 3 -9 with multi
    8·2 answers
  • Hey can you please help me posted picture of question
    15·1 answer
  • Who could help me solve this?<br><br> Y=log x<br><br> If y=10, then what is x?
    7·1 answer
  • Greenfield village is spread across 240 acres of land. Only 37% of the land is used for the exhibits, while the rest of the land
    6·1 answer
  • WHAT IS 1+1? PLEASE HELP IM STRUGGLING SOOOO MUCH ;(
    13·2 answers
  • Pls somebody help me, only right answers :(
    8·1 answer
  • How to find the answer of :125% of _ is 625​
    8·2 answers
  • Complete the table to investigate dilations of exponential functions. Help please!
    12·1 answer
  • In the number 987,654.321, the digit 5 is in which
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!