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
Tasya [4]
3 years ago
15

Quick anyone know the answer?

Mathematics
1 answer:
den301095 [7]3 years ago
8 0
The sum of the measures of angles in all quadrangles is 360 °. Therefore:

(25x+1)+(25x-2)+(20x-1)+82=360\\\\70x+80=360\ \ \ |-80\\\\70x=280\ \ \ |:70\\\\x=4

m\angle D=(20x-1)^o\to m\angle D=(20\cdot4-1)^o=79^o\\\\Answer:\ B.\ 79^o

You might be interested in
Evaluate each expression by replacing the variable with 8. Show each step. (8 marks) 2n - 6
monitta

Answer:

10

Step-by-step explanation:

2n-6

n=8

2(8)-6

16-6

10

4 0
2 years ago
How to solve 2x^2 - 4x = 3
zhenek [66]

Answer:

1 ± i(1/2)√2

Step-by-step explanation:

Write this quadratic in standard form:  subtract 3 from both sides.  This results in 2x^2 - 4x - 3 = 0.  Let's apply the quadratic formula.  The coefficients of the x terms are 2, -4 and -3, so the discriminant is (-4)^2 - 4(2)(-3), or 16 - 24 = -8.

Following the format of the quadratic formula, we get

     -(-4) ±i2√8       4 ±i2√2        

x = ----------------- = --------------- =  1 ± i(1/2)√2

               4                    4

6 0
2 years ago
The sum of two numbers is 13, the difference is 4. What are the numbers?
SSSSS [86.1K]

Answer:

8.5, 4.5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
An 18% tip was left on a $26 lunch bill how much was the tip?
Sergeu [11.5K]

Answer:

$4.68

Step-by-step explanation:


3 0
3 years ago
Read 2 more answers
What is the surface area?
Nesterboy [21]

Answer:

96

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • This table shows the number of points two teams scored in five games
    8·1 answer
  • If you invest $1000 at an interest rate of 2.5% compounded continuously, calculate how many years. How long will it take for you
    8·1 answer
  • Given circle P with arc AE=53, arc BA=68 and arc CB=72 match the following angles with their corresponding measurements
    15·1 answer
  • the character who is in conflict with the main characters in a story is called the _____. protagonist bad guy detractor antagoni
    11·2 answers
  • The length of a rectangle is 6 times its width. the perimeter has to be more than 110 feet. What inequality can be solved to fin
    11·2 answers
  • Simplify 1.0-4<br> o<br> 1<br> y
    9·1 answer
  • What is the zero of the linear function graphed below ? (0,5) (2,-5)
    11·1 answer
  • Find the unit rate for each, then compare. Which is faster?
    11·1 answer
  • PLS HELPPPPPPPPPPPPPPPP
    15·1 answer
  • 4x-5=19 please help thank you
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!