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
PtichkaEL [24]
3 years ago
9

Two of the angles in a triangle measure 56° and 21°. What must be the measure of the third angle?

Mathematics
2 answers:
ELEN [110]3 years ago
5 0

Step-by-step explanation:

the sum of all interior angles in triangle is 180°

180-(56+21)=103°

the third angle is 103°

mel-nik [20]3 years ago
4 0

Answer:

282

Step-by-step explanation:

56+21 = 78

360-78

You might be interested in
Which expressions are equivalent to 71-x-3)? Select two options.
VikaD [51]

Answer:

68-x

Step-by-step explanation:

71-x-3=71-3-x=68-x

8 0
2 years ago
Which mixed number is equivalent to the improper fraction?<br> 14/9
hodyreva [135]

Answer: 1 5/9 (one and five-ninths)

3 0
2 years ago
Tan(2 sin^-1 0.4)<br> Find the Exact value
stiv31 [10]

Answer:

tan(2u)=[4sqrt(21)]/[17]

Step-by-step explanation:

Let u=arcsin(0.4)

tan(2u)=sin(2u)/cos(2u)

tan(2u)=[2sin(u)cos(u)]/[cos^2(u)-sin^2(u)]

If u=arcsin(0.4), then sin(u)=0.4

By the Pythagorean Identity, cos^2(u)+sin^2(u)=1, we have cos^2(u)=1-sin^2(u)=1-(0.4)^2=1-0.16=0.84.

This also implies cos(u)=sqrt(0.84) since cosine is positive.

Plug in values:

tan(2u)=[2(0.4)(sqrt(0.84)]/[0.84-0.16]

tan(2u)=[2(0.4)(sqrt(0.84)]/[0.68]

tan(2u)=[(0.4)(sqrt(0.84)]/[0.34]

tan(2u)=[(40)(sqrt(0.84)]/[34]

tan(2u)=[(20)(sqrt(0.84)]/[17]

Note:

0.84=0.04(21)

So the principal square root of 0.04 is 0.2

Sqrt(0.84)=0.2sqrt(21).

tan(2u)=[(20)(0.2)(sqrt(21)]/[17]

tan(2u)=[(20)(2)sqrt(21)]/[170]

tan(2u)=[(2)(2)sqrt(21)]/[17]

tan(2u)=[4sqrt(21)]/[17]

7 0
3 years ago
The number of coffee bar on different streets of a NY city are 9, 18, 24, 9, 5,
Serjik [45]

Answer:

9

Step-by-step explanation:

The mode is the number that occurs most often. The number nine occurs 4 times.

7 0
1 year ago
Read 2 more answers
Solve for the two possible values of X:
lbvjy [14]
X1 = 1.71429
X2 = 3.4
7 0
3 years ago
Other questions:
  • What is the area of this parallelogram? ​
    9·1 answer
  • Candy and Tim share a paper route. It takes Candy 85 min to deliver all the papers, and it takes Tim 65 min. How long does it ta
    11·1 answer
  • The braking distance in feet of a car traveling at v miles per hour is given by d=1/20v^2 + 2.2v
    5·1 answer
  • Help please what is the sum of the series ?
    10·1 answer
  • I need help with number 3. And 4. Please help me you will get 17 points
    8·2 answers
  • #3 please help I will give you 10 pints
    13·1 answer
  • Brainiest only if you get it right
    11·2 answers
  • A guitar originally priced at $240 is on sale with a 30% discount. How much will you pay for the guitar?
    5·2 answers
  • Need help plzzz with math 20 point plzz help 20 points no links or imma report
    12·2 answers
  • Help pls asap I give brainliest
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!