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
Kaylis [27]
2 years ago
13

Find ∠BCD A)60 B)20 C)80 D)120

Mathematics
1 answer:
liq [111]2 years ago
3 0

Answer:

  • We know : The exterior angle is equal to the sum of two non-adjacent interior amhles. Set up an equation and solve for x :

\longrightarrow \tt5x + 10 = 3x + 3x

\longrightarrow \tt \: 5x  + 10= 6x

\longrightarrow \tt10 = 6x - 5x

\longrightarrow \tt \: 10 = x

Replacing value :

✯\tt m \:  \angle \: \: BCD = 5 \times 10 + 10 =  \boxed{ \tt{60}}

  • Our Final answer is 60 .

-------------- HappY LearninG <3 -------

You might be interested in
What are the answers for both of those if you get it right I’ll also give you brainliest answer comment
tangare [24]

Answer:

answer 1,  135

Step-by-step explanation:

6 0
3 years ago
SOMEONE HELP PLEASE! ASAP!
Luba_88 [7]
When two lines intersect, the angles across from the intersection (the "X") are congruent (equal), and referred to as "vertical angles."
So by the rule of vertical angles are congruent, we can set them equal:
{x}^{2}  - 6x = 1\div2 \: x + 42 \\  {x}^{2}  - 6x - 1 \div 2 \: x = 42 \\  {x}^{2}  - 6.5x = 42
{x}^{2}  - 6.5x - 42 = 0 \\ multiply \: both\: sides \: by \: 2 \: to \: get \\ rid \: of \: the \: decimal \\ 2({x}^{2}  - 6.5x - 42) = 2(0)
2 {x}^{2}  - 13x - 84 = 0
to factor we need the factors of 84:
1×84, 2×42, 3×28, 4×21, 6×14
Now we need one of those factors ×2 ( from the x^2 term) minus the other factor to equal 13 (the middle term)
it turns out that if we use 4×21: 4×2 = 8
and 21-8 = 13. Woohoo! we got it
So now we have:
2 {x}^{2}  - 13x - 84 = 0 \\ (2x - 21)(x + 4) = 0
Now set each factor = 0
1) 2x - 21 = 0 and 2) x + 4 = 0
1) 2x - 21 = 0, 2x = 21, x = 21/2 = 10.5
2) x + 4 = 0, x = -4

Now we plug in each answer to check:
1) x = 10.5
{x}^{2}  - 6x =  {(10.5)}^{2}  - 6(10.5) \\  = 110.25 - 63 = 47.25
1/2x + 42 = 1/2(10.5) + 42 = 5.25 + 42 = 47.25
47.25 = 47.25
BAM SO IT LOOKS LIKE THAT'S IT!!
But let's check 2) first:
2) x = -4
{( - 4)}^{2}  - 6( - 4) = 16 + 24 = 40
1/2x + 42 = 1/2(-4) + 42 = -2 + 42 = 40
40 = 40, so both work!!
But it asks for m<1, and <1 is supplementary because it lies on same line, meaning the sum of both = 189
Therefore m<1 = 180 - 47.25 = 132.75°
OR m<1 = 180 - 40 = 140°


6 0
3 years ago
Solve for X when the surface area is 298ft^2
jok3333 [9.3K]

Step-by-step explanation:

Total surface area of cuboid= 2(lb+bh+hl)

= 298ft²=2(28+4x+7x)

= 149=28+11x

= 121=11x

= 11=x

6 0
2 years ago
Help thanks !!!!!!!!!!!!!
Elden [556K]

Answer:

5:2

Step-by-step explanation:

There are 5 apples and 2 cherries. Put them together to get 5:2.

4 0
3 years ago
Read 2 more answers
I need thee answer :)
sladkih [1.3K]

Answer:

12%

Step-by-step explanation:

75-75*0.2=60

60+60*0.1=66

66/75=0.88=88%

3 0
3 years ago
Other questions:
  • The dimensions of the rectangular pool shown below are 50 yards by 25 yards. A fence will be built around the outside of the dec
    9·1 answer
  • Select the true statement about the series, ¾ + 7/8 + 11/12 + 15/16…
    9·1 answer
  • A bag contains 6 red marbles, 3 white marbles, and 7 blue marbles. you pick a marble without looking. find the probability of dr
    12·2 answers
  • For a school fund raising project, Aiden and Jacob collected money in the ratio of 3.5 : 6.8. Jacob collected $115.50 more than
    13·1 answer
  • John and 2 friends each ate 5/6 of pizza, how many pizza's did the consume all together
    6·1 answer
  • After a game, Coach Jones wants to serve punch to the players on her soccer team. She will mix 2 quarts of ginger ale and 1 gall
    8·1 answer
  • Centimeter using decimal<br> 63mm
    15·1 answer
  • If Cade shoots 318 free throw baskets in 4 hours, about how many can he shoot in 7 hours?
    7·2 answers
  • jamie is making chocolate cupcakes. the recipe calls for 2/3 cup of cocoa. she wants to make 1/2 of the recipe. how much cocoa w
    7·1 answer
  • What is the sum of 50.249 + 21.3
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!