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uranmaximum [27]
3 years ago
9

If ABC=85,CBD=140 , and ,ABD=1/2x=30 find the value of x.

Mathematics
2 answers:
damaskus [11]3 years ago
8 0

If ABC=85,CBD=140 , and ,ABD=1/2x=30 find the value of x.

m∠ABD = m∠ABC + m∠CBD

m∠ABC = m∠ABD - m∠CBD

m∠ABC = 85° - m∠CBD

nexus9112 [7]3 years ago
5 0
Based on the given nomenclature of angles, I think the illustration would look like that shown in the attached picture. The common vertex is point B, that's why the middle point of the given angles is B. Now, according to Angle Addition Postulate, the individual interior angles should sum up to the total angle. So, the equation would be

m∠ABD = m∠ABC + m∠CBD
m∠ABC = m∠ABD - m∠CBD
m∠ABC = 85° - m∠CBD

Read more on Brainly.com - brainly.com/question/5023714#readmore
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3 years ago
Solve the system by substitution. Check your solution.
Zepler [3.9K]

Answer:

a.  (15, 15)

Step-by-step explanation:

We start with those two equations:

1) a - 1.2b = -3

2) 0.2b + 0.6a = 12

We'll begin by modifying equation #1 to isolate a:

a = -3 + 1.2b

Then we'll use this value for a in the second equation:

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3 0
3 years ago
3x – y = -1 x – 2y = -12
Leviafan [203]

The solution to the system of equation is (2, 7)

<h3>System of equation</h3>

Given the  system of equation expressed as:

3x – y = -1  * 2

x – 2y = -12 * 1

________________

6x – 2y = -2

x – 2y = -12

Subtract to have;

6x-x = -2-(-12)

5x = 10

x = 2

Substitute x = 2 into 2 to have:

2 - 2y = -12

-2y = -14

y = 7

Hence the solution to the system of equation is (2, 7)

Learn more on system of equation here: brainly.com/question/25976025

#SPJ1

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1 year ago
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maria [59]

Answer:

You need to be more clearer with the money amount not like 4.20 - 4.50

Step-by-step explanation:

7 0
3 years ago
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