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
valkas [14]
3 years ago
12

Calculate the value of the exterior angle

Mathematics
1 answer:
aev [14]3 years ago
8 0

What we know is that the sum of a triangle's internal angles are 180º, and a straight angle makes 180º.

first, we have to find the third internal angle(let's call it n) so that we can use it to find the exterior angle.

(3x + 20) + (4x + 5) + n = 180

simplify:

7x + 25 + n = 180

7x + n = 155

n = 155 - 7x

Now we can add it to the external angle to find x.

(155 - 7x) + (8x + 15) = 180

simplify:

170 + 8x - 7x = 180

170 + x = 180

x = 10

Now we can substitute it to the external angle.

8 x 10 + 15 = 95

the exterior angle is 95º.

You might be interested in
Please answer please!! Please answer 1–4 please actually answer please I need thissss
Mashutka [201]
1. 75% increase
2. 30% decrease
3. 80% increase
4. 25% decrease
6 0
2 years ago
Harry got 42 out of 49 correct in his test.<br> What fraction of the marks did he get wrong?
brilliants [131]

Answer:

1/7

Or,

7/49

Or,

(49-42)/49

5 0
2 years ago
Read 2 more answers
A farming council takes a large random survey of US adults in which they ask how many times they ate a
Lady_Fox [76]

Answer:

Histogram A

Step-by-step explanation:

Because I was trying to find the answer but I got it wrong and it told me the answer <3

6 0
3 years ago
Use the reciprocal property to solve for x:
Natali5045456 [20]

Answer:

The answer is 1800.

Step-by-step explanation:

3/540 = 10/x

3x = 540 × 10

x = 5400/3

x = 1800

6 0
3 years ago
2000 tickets were sold in exhibit on Saturday the cost of a ticket for an adult is four dollars and for a child is two dollars a
PolarNik [594]

Answer:

look at picture

Step-by-step explanation:

x: adult tickets

t: children tickets

8 0
3 years ago
Other questions:
  • In the figure, the slope of mid-segment DE is -0.4. The slope of segment AC is . i need help fast plz
    10·2 answers
  • Solve the simultaneous equations.
    7·1 answer
  • At the beginning of the year, Jason had $80 his savings account. Each month, he added $15 to his account. Write an expression fo
    5·2 answers
  • What is the value of 43x8
    6·2 answers
  • F(x)=2/x and g(x)=2/x what is f(g(x))
    6·1 answer
  • What is y if c≠d? Please help!
    6·1 answer
  • For each equation, determine if x=2 is a solution.
    9·1 answer
  • I GIVE BRAINLIEST FOR EXPLANATION AND CORRECT ANSWER EXTRA POINTS
    10·1 answer
  • Muhammad is paid x dollars an hour. He received a 10% raise. Which expression can Michael use to calculate his new hourly wage?
    14·1 answer
  • Find the area of the figure​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!