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
timurjin [86]
3 years ago
14

The Three sides of a triangle are, n, 4n-2, 4n-7. if the perimeter of the traingle is 45cm, what is the length of each side?​

Mathematics
2 answers:
kogti [31]3 years ago
4 0

Answer:

52

Step-by-step explanation:

stealth61 [152]3 years ago
3 0
Well to start, we need to combine like terms all the equations together , so
n+ 4n+4n = 9n
-2-7 = -9
put them together and it’s
9n - 9
the perimeter is 45 so
9n - 9 = 45
+9 +9
——————
9n = 54
——————-
9 9
Then the 9 cancels, drop down the n and divide 54/9 and you get

n = 6

and that’s the answer
to prove it
you can do
4(6) - 2 = 22
4(6) - 7 = 17
+ 6 because you just replace the n with 6
Add them...
22+17+6 = 45
and so now we know for sure the value of n is 6!
You might be interested in
PLZZZ HURRYYY!!Which graph best represents the solution to the system of equations shown below? y = -4x + 19 y = 2x + 1 A coordi
elena-s [515]

Answer:

Two lines are shown intersecting on ordered pair 3, 7.

Step-by-step explanation:

The first of the two lines has a slope of -4 and a y-intercept of 19 (off the top of the graph). It will decrease 4 units for each 1 unit to the right.

The second of the two lines has a slope of +2 and a y-intercept of +1. It will increase 2 units for each 1 unit to the right.

These two lines must intersect in the first quadrant at a point with an x-value less than 5, eliminating the first and last two choices, leaving only the second choice you have listed here.

You would have to examine the graphs to see which has the lines with proper slope and intercept.

My graphing calculator's solution is attached.

8 0
3 years ago
Solve for x.<br><br> 4 | x - 7 | + 2 | x - 7 | = 12
miv72 [106K]

Answer: x = 9, 5

<u>Step-by-step explanation:</u>

4 | x - 7 | + 2 | x - 7 | = 12

6 | x - 7 | = 12      <em>added like terms</em>

  | x - 7 | = 2       <em>divided both sides by 6</em>

x - 7 = 2         or         x - 7 = -2     <em>removed absolute value sign</em>

    x = 9         or               x = 5     <em>added 7 to both sides of both equations</em>

7 0
4 years ago
What is the point slope form of the line with slope −14 that passes through the point (−2, 9) ?
Readme [11.4K]
I think the answer is D 
3 0
3 years ago
Read 2 more answers
What is the value of n?<br><br> Enter your answer in the box.<br><br> n = <br> cm
dmitriy555 [2]
If two chords intersect each other inside a circle, the products of their segments are equal.

3n = 6*4
3n = 24
n = 24/3
n = 8
6 0
3 years ago
Read 2 more answers
Rad 18x^5y + Rad 32xy^3 - Rad 128xy
True [87]
Sqrt(18x^5y) + sqrt(32xy^3) - sqrt(128xy)
You may separate the roots to produce solvable square roots!

sqrt(9x^4)*sqrt(2xy) + sqrt(16y^2)*sqrt(2xy) - sqrt(64)*sqrt(2xy)

Simplifying makes it ...
(3x^2 + 4y - 8)*sqrt(2xy)
This should be the closest you can get to a simplified equation.
5 0
3 years ago
Other questions:
  • find 40% of 60 using two different strageties, one of which must include a pictorial model or digram?pls help
    15·1 answer
  • I need help!!!!!! what is x&amp;y?
    14·1 answer
  • The estimated product of two numbers is 2,800 what are they?
    7·1 answer
  • togather Preston and Horatio have 49 video games Horatio has 11 more games than Preston how many games does each person have
    14·1 answer
  • For the function y = -2x + 20, what is the output when the input is 50.
    13·1 answer
  • Which statement compares the shape of the dot plots?
    7·2 answers
  • If someone can help me with this question and get it right I will mark brainliest.
    14·1 answer
  • Pls help :&gt; i will give 40 points
    7·2 answers
  • Explain the difference in meaning between 1-3 and -3 help help :0
    7·1 answer
  • Which equation represents this situation?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!