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
ryzh [129]
2 years ago
12

How do i know when to add or subtract in an angle equation?

Mathematics
1 answer:
madam [21]2 years ago
7 0

Answer:

17

Step-by-step explanation:

< ABD = <ABC + < CBD

Substitute in what we are given

87 = 9x-1 +   6x+58

Combine like terms

87 = 15x +57

Subtract 57 from each side

87-57 =15x +57-57

30 = 15x

Divide by 15

30/15 =15x/15

2=x

We want to find <ABC

<ABC = 9x-1

         = 9*2-1

         =18-1

      =17

You might be interested in
Four dice, each numbered in the usual way from 1 to 6, are colored white, red, green and blue respectively. After casting them a
Delvig [45]
Suppose that the numbers that the boy being cast from the dice are 3 4 5 6.
 3 stands for white, 4 stands for red, 5 stands for green and 6 stands for blue.
  We need to interpret the statement given above.   The set of numbers is 3 4 4 6 6 5.
First, we need to get the mean of this set. Add all the numbers and divide by the total number that the set has. 
 3+4+4+6+6+5=  28 / 6
                        = 4.67    The mean is 4.67
For the variance, we will use the mean above ( 4.67 )

1. Squared the mean and subtract how many numbers are present in the set. 
   4.67x4.67= 21.8089 /6 = 3.64 set aside this result
2. Next squared all the numbers present in the set and add the result 

  3x3= 9 , 4x4= 16, 4x4=16, 6x6=36, 6x6=36, 5x5=25

9+16+16+36+36+25= 138 

3. Subtract the result of #2 with #1
          138 - 3.64=  134.36 set this aside

4. Subtract 1 from the total numbers you have in your set

 6 - 1= 5 

5. Divide the result we have in #3 with the result of #4

  134.36 / 5= 26. 872

So the variance is 26.872 
5 0
2 years ago
Need some help on this question
Lapatulllka [165]

Answer:

No because my brain doesn't work on math and I need help on solving inequalities

4 0
2 years ago
-4.2 (-2.8+4.5) what is the value of the expression
Artyom0805 [142]
-7.14 should be your answer!
4 0
3 years ago
What is 8/12 in simplest form
Pani-rosa [81]
8/12 in simplest form is 2/3.
5 0
3 years ago
Find the area.<br> 7 m<br> 4 m<br> 4 m<br> square meters
morpeh [17]

Answer:

gianas

Step-by-step explanation:

antetekumpo the nba rocket fuel

5 0
3 years ago
Other questions:
  • Which sequence of transformations can change the size of a polygon? Select all that apply
    12·2 answers
  • Which number line shows the solution to the quality -3x -5 &lt;-2
    5·1 answer
  • Please help thank you
    8·2 answers
  • Prove that for any natural n the value of the expression (n+7)^2–n^2 is divisible by 7.
    7·1 answer
  • What does this equal
    10·2 answers
  • What is the slope of the line that contains the points (-1, 2) and (3, 3)?
    8·1 answer
  • What is the value of 43x8
    6·2 answers
  • Brenda bought a coat for $20. She also paid $1.50 in tax. What kind of tax did Brenda pay on the coat?
    13·1 answer
  • Write the ratio as a fraction in simplest form.
    9·1 answer
  • Find an ordered pair for x and y
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!