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
Art [367]
3 years ago
13

An isosceles triangle has two sides of equal length. The third side is five less than twice the length of one of the other sides

. If the perimeter of the triangle is 23 cm what is the length of the third side?
Mathematics
2 answers:
4vir4ik [10]3 years ago
5 0

Answer:

9

Step-by-step explanation:

We can set up a systems of equations to find the value of the third side.

Let's assume that x is the length of both sides 1 and 2. Let's also assume that y is the length of the third side.

We know that x + x + y = 23, and looking at the first clue we can make the equation y = 2x-5.

We can substitute y into the equation x + x + y = 23.

x + x + (2x-5) = 23\\\\2x + 2x-5 = 23\\4x-5 = 23\\4x = 28\\x = 7

So the length of the side that is the same as the second is 7.

Now we can plug this into the equation y = 2x-5 to find y.

y = 2(7) - 5\\\\y = 14-5\\\\y = 9

Hope this helped!

maria [59]3 years ago
3 0

Answer:

9 cm

Step-by-step explanation:

Let's say that the length of the 2 equal sides is x.

That means:

Side 1 = x

Side 2 = x

We know that the third side is 5 less than twice the length of the 2 equal sides, or 2x-5

Side 3 = 2x-5

The perimeter is all sides together.

Side 1 + Side 2 + Side 3

We know the length of each side, so let's put that in instead.

x + x + 2x-5

Let's simplify this expression:

x + x + 2x - 5

2x + 2x - 5

4x - 5

We know the perimeter, 4x-5, is 23 cm.

4x - 5 = 23

4x = 28

x = 7

The third side is 2x-5. If x is 7...

2*7 - 5 = 14-5 = 9

Answer: 9 cm

You might be interested in
What is the coefficient and degree of 6v^7
Dmitriy789 [7]
I believe v is your coefficient and the degree is 7
8 0
3 years ago
HELP.... please??????????????
Nostrana [21]

Answers:

Functions

  • y = -x+11
  • y = 2x^2-6x+4
  • y = -7

Not functions

  • x = 3
  • x^2+y^2 = 81
  • y^2 = -5x-12

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

Explanation:

A function is possible if and only if any given x input leads to exactly one y output.

For something like x^2+y^2 = 81, we can see that x = 0 leads to either y = 9 or y = -9. So this would <u>not</u> be a function. We would need x to pair with only y value to have it be a function.

We have the same thing going on with y^2 = -5x-12 as well.

For anything of the form x = k, where k is any real number, this is also not a function. We have one single input only and it leads to infinitely many outputs. So in a sense, this is even worse compared to the other examples.

-----------------

In summary, we have these three non-functions:

  • x = 3
  • x^2+y^2 = 81
  • y^2 = -5x-12

Everything else is a function. You can use the vertical line test as a visual way to check.

8 0
3 years ago
I need help, my teacher didnt teach up this​
nlexa [21]

Answer:

The volume is <u>1539.38</u>

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
If BC = 4 and CD = 27, find AC.
lys-0071 [83]
Answer is 4 because there are both length plus breadth
3 0
3 years ago
Which could be the function graphed below?
madam [21]

f(x)=\sqrt{x} -2 is the correct option

3 0
3 years ago
Other questions:
  • Nyoko needs to be at school at 7:45 AM. It takes her 15 minutes to walk to school, 5/12 hour to eat breakfast, 0.7 hour to get d
    5·1 answer
  • A taxi charges $7.50 plus $0.45 per mile.
    6·1 answer
  • A basketball player has a 50% chance of making each free throw. What is the
    13·1 answer
  • the expression 12g gives the number of kilometers a car can travel using g liters of gasoline how far can this car travel on 5 1
    10·1 answer
  • Y=6x+5 is the equation. what is its gradient
    6·1 answer
  • How many different outfits can Josh make with 3 tops, 2 pairs of jeans, and
    6·2 answers
  • When I graphed the linear​ function, it turned out to be a wavy curve.
    13·1 answer
  • Escribe un párrafo con por lo menos 5 oraciones acerca de este crimen. ¿Quién cometió el crimen? ¿Por qué piensas que era esa pe
    15·1 answer
  • Use triangle ABC to write the value of tanA
    14·1 answer
  • Which of the following package deals is a better buy according to unit price?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!