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
dolphi86 [110]
3 years ago
5

For this right triangle, what is the cosine of angle C?

Mathematics
1 answer:
ollegr [7]3 years ago
3 0

Answer:

A  cos C = 12/13

Step-by-step explanation:

cos theta = adjacent side/ hypotenuse

cos C = BC/AC

But we don't know BC, but we can find it using the Pythagorean theorem

a^2 +b^2 = c^2

5^2 +BC^2 = 13^2

25 + BC ^2 =169

Subtract 25 from each side

BC^2 = 169-25

BC ^2 = 144

Taking the square root of each side

BC =12

cos C = 12/13

You might be interested in
Can someone please help me with the answer
pychu [463]

Answer:

x =  \frac{46}{3}

Step-by-step explanation:

A straight angle is equal to 180° degrees. Since both 9x +4 and 3x -18 is supplementary then I can make this claim below

(9x + 4 ) + (3x - 8) = 180

All we have to do now is to solve for x

(9x + 4) + (3x - 8) = 180 \\ 9x + 4+ 3x - 8 = 180 \\ 12x - 4 = 180 \\ 12x = 184 \\ x = \frac{184}{12}  \\ x =  \frac{46}{3}

6 0
3 years ago
How would you solve dy/dx = (-3y + 12x^2)/x? I can use any method to solve it, but I just don't know how.
frez [133]
Pemdas start with this then see how your answer comes out then you isolate a variable do that complete your math to get your answer, hope this helped!!
4 0
3 years ago
Read 2 more answers
Abag contains 2 Snicker
Svet_ta [14]
There is a 19% chance they will pick a trix bar, then a crunch bar
7 0
3 years ago
Read 2 more answers
30 POINTS PLEASE HELP! Evaluate the piecewise-defined function at x=3. See picture below
VladimirAG [237]

Answer: -11

Step-by-step explanation:

For this problem, it is important to look at the domains next to the function. In this problem there is a function for when x < 1 and when x ≥ 1. 3 is greater than 1, so we will use the second equation.

From there, plug in 3 for x and solve.

-2x - 5

-2(3) - 5

-6 - 5

-11

4 0
3 years ago
Simplify 5 - 2 x 3 + 4. Choices are A.) 13 B.) 3 C.) -5 D.) 21
Bumek [7]

Answer:

Answer. c

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Find the length of B to the nearest tenth using the Pythagorean theorem.​
    13·1 answer
  • In the last school election, 88% of the student body voted. If the school has an enrollment of 350 students, how many students v
    11·2 answers
  • Find the least common multiple of 5 10 and 15
    8·1 answer
  • Given below is the odd-number function. Which of the following are equal to O(20)? Check all that apply. O(n) = 2n - 1 A. O(19)
    9·1 answer
  • 10.
    10·1 answer
  • 1. Use the table and the graph to answer the questions.
    11·1 answer
  • How much is a plane ticket to california from iowa?
    6·1 answer
  • What fraction is 8in3 of 2ft3?
    13·1 answer
  • Help pls !!!! Math is fun
    10·1 answer
  • Evaluate 19x-(7+x)+8+x when x=2. Show Your Work​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!