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
notsponge [240]
3 years ago
10

Describe and correct the error in finding the measure of the angle

Mathematics
1 answer:
DerKrebs [107]3 years ago
5 0

Sorry, it's late, and I'm a bad explainer.

The error is adding (2x-12) with x and 30. This is wrong because you are adding the angles inside the triangle and you are assuming that (2x - 12) is the unlabeled angle INSIDE the triangle, when it is the exterior angle/outside of the triangle.

A straight line is also 180°.

(2x - 12) + ? = 180

30 + x + ? = 180

If you look at the equations, and put parentheses around 30 + x, (30 + x) and (2x - 12) should be the SAME NUMBER. So you could set them equal to each other to find x. (or you could also look at the picture and see that they both need/are missing the same angle)

2x - 12 = 30 + x

x = 42

Now you plug 42 into the exterior angle equation

2(42) - 12 = 84 - 12 = 72°

You might be interested in
Lilian is packing gifts for the needy. She has 240 toys and 180 books
Virty [35]

Answer:

1. 240+180=420 packages.

2. 420 ÷ 240=2 toys and 1 left over.

3. 420 ÷ 180=2 books and 1 left over.

Step-by-step explanation:

Lilian can either put 1 toy and 1 book in the same package or separate them.

6 0
3 years ago
Read 2 more answers
Which expression is equivalent to (x^1/2y^-1/4z)^-2?
tiny-mole [99]

Answer:

y^1/2/xz^2 option 3

Step-by-step explanation:

(x^1/2 y^-1/4 z)^-2= x^(-1/2*2) y^(1/4*2) z^-2= x^-1 y^1/2 z^-2= y^1/2/xz^2

7 0
3 years ago
____% of 25 is 3 i need help with this paperany help with this papers ​
ra1l [238]

Answer: 12

Step-by-step explanation:

3 0
3 years ago
Set up a proportion and solve the height of the three .
Naddik [55]

Answer:

60 feet

Step-by-step explanation:

Setting the proportion up:

x/25=24/10

Cross Multiply.

10x=24*25

10x=600

Divide both sides by 10.

x=60

7 0
2 years ago
Read 2 more answers
What if the GCF of 18 and 54?
Viktor [21]

Answer:

18 is the GCF for 18 and 54

8 0
2 years ago
Read 2 more answers
Other questions:
  • Hansika paid $9.25 for 2.8 pounds of pretzels. About how much did she pay for a pound of pretzels?
    15·2 answers
  • Solve the following equation: 5+7x=11+7x
    10·2 answers
  • Write the equation of the line given 2 points that it passes through<br><br> (-3,7)&amp;(-9,5)
    13·1 answer
  • 21. The total price of six cans of coke is $21.
    7·1 answer
  • Malcolm and Ravi raced each other. The average of their maximum speeds was 260\text{ km/h}260 km/h260, space, k, m, slash, h. If
    10·1 answer
  • Which is one of the transformations applied to the graph of f(x)=x^2 to change it into the graph of g(x)=-x^2+16x-44
    9·2 answers
  • Help Please I'll give a brainliest.
    15·2 answers
  • What is the slope?<br> (0, 4)<br> (2, 10)
    7·2 answers
  • Help me w/ both of them pls The last one is just for me to laugh heheehe
    6·2 answers
  • Help please <br> f − –7/3 = 3
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!