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
olga_2 [115]
2 years ago
5

Please help!! I need all I can get!!

Mathematics
1 answer:
LuckyWell [14K]2 years ago
3 0

Answer:

x = 13

Step-by-step explanation:

6x + 14 + 4x - 8 + 2x + 18 = 180  {Angle sum property of tiangle}

6x + 4x + 2x + 14 - 8 +18 = 180 {Combine like terms}

                         12x + 24 = 180 {Subtract 18 from both sides}

                                  12x = 180 - 24

                                  12x = 156       {Divide both sides by 12}

                                     x = 156/12

x = 13

You might be interested in
The chemistry class was making 300 gallons of 30% isopropyl alcohol. They mixed 12% with 42%. How much of each did they use?
alexgriva [62]

Answer:

<u>The chemistry class mixed 120 gallons of 12% isopropyl alcohol and 180 gallons of 42% isopropyl alcohol.</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Amount of isopropyl alcohol made by the chemistry class = 300 of 30%

Amount of 12% isopropyl alcohol mixed by the chemistry class = x

Amount of 42% isopropyl alcohol mixed by the chemistry class = 300 - x

2. How much of each did they use?

Let's write our equation to solve for x, this way:

30% = 0.3, 12% = 0.12, 42% = 0.42

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12x + 126 - 0.42x = 90

-0.3x = 90 - 126

-0.3x = -36

x = -36/-0.3

<u>x = 120 ⇒ 300 - x = 180</u>

<u>Let's prove x = 120 is correct</u>

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12 * 120 + 0.42 (300 - 120) = 0.3 * 300

14.4 + 75.6 = 90

90 = 90

<u>We proved x = 120 is correct</u>

5 0
3 years ago
Seriously need help working + answer
allsm [11]
This is the answer (−1.550510257)
6 0
3 years ago
Read 2 more answers
What does pi equal? BTW yesterday was pi day (:
Marianna [84]
Pi is the same as
private investigator
8 0
3 years ago
Read 2 more answers
21.4.2 Quiz: Introduction to Proofs
attashe74 [19]

Answer:

B. A conclusion proved by deductive reasoning

Step-by-step explanation:

Other brainly users also said the same thing

4 0
1 year ago
What is a proportion that has means 6 and 18 and extremes 9 and 12
Alex787 [66]
3 and 3 is the correct answer ...
5 0
3 years ago
Read 2 more answers
Other questions:
  • I need help with this Algebra
    14·1 answer
  • Evaluate the expression 4y/x for x=8 and y=0
    6·1 answer
  • 7.) When rounding to the nearest 10, what is the largest number that will
    5·1 answer
  • - 4x + 9y = 9<br> x - 3y = -6
    10·1 answer
  • URGENT! Move all the right triangles into the box.
    5·2 answers
  • 1 2 3
    8·1 answer
  • An airplane 30,100 feet above the ground begins descending at the rate of 2150 feet per minute. Write and solve a linear equatio
    8·1 answer
  • HELLLLLLLPPPPPPPPPP MEEEEEEEEEEEEEEEEEEE
    10·2 answers
  • write the equation of a line that is perpendicular to the line y=-3/7-15 and that passes through the point (9,2)
    10·1 answer
  • Which choices are equivalent to the expression below? Check all that apply.<br> 3sqrt8
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!