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
ss7ja [257]
3 years ago
8

L really need help plz i will mark brainliest plz help​

Mathematics
2 answers:
Delicious77 [7]3 years ago
6 0

Answer:

Sean is not correct. The answers are 100°, 35° and 45°.

Step-by-step explanation:

In my working, I labeled the part without a variable as a°.

Step 1: a° + 80° = 180° ( angles on a straight line sum up to 180° )

Step 2: a° = 180° - 80°. This is because 80 moves from the left side of the equation to the right side of the equation which affects it's sign( from + to -)

Step 3: a° = 100° . Subtract 80 from 180.

So we know that 100 is correct. Let's find the remaining angles.

Step 4: a° + ( x - 5 )° + ( x + 5 )° = 180° ( angles in a triangle sum up to 180°)

Step 5: 100° + x - 5° + x + 5° = 180°. Fix in the values of each variable correctly. Here we only know the value of variable a.

Step 6: (100° - 5° + 5°) + (x + x) = 180°. Group like terms to make calculations easier.

Step 7: 100° + 2x = 180°. -5+5 is the same as 5-5 which would give you 0. 0 + 100° is 100°.

Step 8: 2x = 180° - 100°. Move like terms to one side.

Step 9: 2x= 80°. Subtract 100° from 180° to get 80°

Step 10: 2x/2 = 80°/ 2. Divide both sides by 2.

Step 11: x= 40°. But this isn't the final answer. This is just the answer for all the x you see in the diagram. So fix in the values correctly.

Step 12: ( x-5° ). State it for your teacher to know which question you are given an answer to. From our calculations, we know that x = 40°.

Step 13: (40° - 5°)

Step 14: ( 35°). 40 minus 5 is 35.

Step 15: 35°. multiply the figure in the bracket by one. We can't leave our answer in the bracket.

Step 16: (x + 5). Using the same knowledge, fix in the values and do as the operation sign says.

Step 17: ( 40° + 5 °)

Step 18: (45°)

Step 19: 45 °

Step 20: Sean is not right because the angles in the triangle are 100°, 35° and 40°.

Ipatiy [6.2K]3 years ago
5 0

\\ \sf\longmapsto x+5+x-5=80

\\ \sf\longmapsto 2x=80

\\ \sf\longmapsto x=40

Angles are

  • 180-80=100°
  • x+5=40+5=45°
  • x-5=40-5=35°

No sean was wrong

You might be interested in
Can someone explain how to find the IQR for box plots?
never [62]
Go on the top right corner w the 3 dots
7 0
3 years ago
Read 2 more answers
What is 2/3 times 1/4
barxatty [35]
(2/3)(1/4)=
2/12=
1/6
multiply the numerators by the numerators, (top numbers)
and the denominators by the denominators, (bottom numbers)
6 0
3 years ago
Justify each step.<br> 15. 2x – 5 = –20<br> 2x = -15<br> x=_15
Dimas [21]
1st: add 5 to each side
2nd: divide by 2 on each side
5 0
3 years ago
Help PLSS HELP ASAP<br> TAN^2 X + SQRT3 TAN X =[0}
Delicious77 [7]

\boxed{\large{\bold{\textbf{\textsf{{\color{blue}{Answer}}}}}}:)}

see this attachment ☝☝☝

8 0
3 years ago
Solve by unfolding: a0=2, and, n&gt;=1, a_n=7a_n-1.
vodomira [7]
We are told that the first term is 2.  The next term is 7(2) = 14; the third term is 7(14) = 98.  And so on.  So, the first term and the common ratio (7) are known.

The nth term of this geometric series is a_n = 2(7)^(n-1).

Check:  What is the first term?  We expect it is 2.  2(7)^(1-1) = 2(1) = 2.  Correct.

What is the third term?  We expect it is 98.  2(7)^(3-1) = 2(7)^2 = 98.  Right.<span />
6 0
3 years ago
Other questions:
  • If -2x+6=24 what is the value of x
    8·1 answer
  • What number should be added to both sides of the equation to complete the square? x2 + 3x = 6
    7·1 answer
  • Identify the vertex, focus, and directrix. y=1/8y^2
    13·1 answer
  • 38. What is the solution to 2(x - 6) = 14?
    11·2 answers
  • A poster has an area of 5 square feet. what is its area in square inches?
    7·1 answer
  • What two numbers multiply to -52 and add up to 24
    14·2 answers
  • The line plot shows the height of plants in inches that were planted last week.How much greater is the longest plant than the sh
    8·1 answer
  • You buy a shirt for $19.95 and a pair of shorts for $35.95. Shirts are on sale for 25% off and shorts are on sale for 30% off. W
    15·1 answer
  • The street signs in a subdivision are in the shape of
    9·1 answer
  • I need help please help me i’m freaking out and I really need this
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!