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
iren2701 [21]
2 years ago
5

Somebody pls help me!!!

Mathematics
2 answers:
Setler [38]2 years ago
4 0
<h3>Answer:  60 units</h3>

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

Explanation:

The similar red marks on the angles tell us those angles are congruent. So they are the same measure.

The sides opposite those congruent angles are the same length. This means AC = BC. This triangle is isosceles.

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

Solve for x

AC = BC

5x-8 = 2x+7 .... substitution

5x-8-2x = 7 ... subtract 2x from both sides

5x-2x = 7+8 ..... add 8 to both sides

3x = 15

x = 15/3 ... divide both sides by 3

x = 5

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

Use that x value to compute each side length

AB = 3x+11 = 3*5+11 = 15+11 = 26

BC = 2x+7 = 2*5+7 = 10+7 = 17

CA = 5x-8 = 5*5-8 = 25-8 = 17

Note how BC and CA are the same length (17 units). This helps confirm we have the right x value.

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

The last step is to add up all the side lengths to get the perimeter

perimeter of triangle = sum of all the sides

perimeter of triangle = side1 + side2 + side3

perimeter of triangle ABC = AB + BC + CA

perimeter of triangle ABC = 26 + 17 + 17

perimeter of triangle ABC = 60 units

natta225 [31]2 years ago
3 0

Answer:

Step-by-step explanation:

Remark

The sides opposite the 2 base angles are equal. That gives you x. Then all you have to do is substitute in the 3 binomials.

Equation

5x - 8 = 2x + 7                 Add 8 to both sides

Solution

5x - 8 + 8 = 2x + 7 + 8   Combine

5x = 2x + 15                   Subtract 2x from both sides

5x-2x = 2x-2x + 15        Combine

3x = 15                           Divide by 3

x = 5

Side length

5x - 8 = 5*5 - 8 = 25 - 8

5x - 8 = 17

3x + 11 = 3*5 + 11 = 15 + 11 = 26

Perimeter

17

17

<u>26    Add</u>

Perimeter = 60

You might be interested in
How can you use similar triangles to solve real-world problems?
Pavel [41]

Answer:

similar triangles can be used to find the height of a building.

Step-by-step explanation:

3 0
2 years ago
The scatter plot for which type of data is most likely to suggest a linear association between
chubhunter [2.5K]

Answer:

level of water in a reservoir each....

Step-by-step explanation:

4 0
3 years ago
!!)
Arlecino [84]
There’s no circle :/ sorry
6 0
3 years ago
Stuck at this question I need in 5 mins! Need it ASAP
podryga [215]

Answer:45



Step-by-step explanation:


6 0
3 years ago
Blue Ray's computer sales totaled $59,500 last month. She receives a commission rate of 15% on all sales. What commission did sh
LenaWriter [7]

Answer: $8,925

Step-by-step explanation:

Convert 15% to decimals. You can do this by dividing by 100.

\frac{15}{100}=0.15

Now, take the total amount of the sales and multiply it by this decimal.

59,500*0.15=8925

5 0
3 years ago
Other questions:
  • At school barbecue 3 times as many hot dogs were served as Hamburgers. if there were 124
    15·2 answers
  • Find the general solution of the given differential equation. y''' − 2y'' − 4y' + 8y = 0
    9·1 answer
  • Round 132874015 to the nearest hundreds-thousands.
    7·2 answers
  • Name three uses for mercury
    6·2 answers
  • Which quantity is proportional to 12⁄48?
    6·2 answers
  • -4y minus 3 plus 3y equals 8 minus 2y minus 15
    11·1 answer
  • Write a percent between 25% and 50% then write it as a decimal and as a fraction in show your work explain your answer I need he
    14·1 answer
  • Given parallelogram find the measure of DG
    12·1 answer
  • Find the area of the shaded region. Round your answer to the nearest tenth if needed.
    8·1 answer
  • 2/18 = x/36 solve each proportion
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!