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
Umnica [9.8K]
3 years ago
7

TriangleABC has three sides with these lengths: AB=9, BC=40, and CA=41, What is the value of cos C?

Mathematics
1 answer:
Otrada [13]3 years ago
3 0

Answer:

9² = 40² + 41² - 2(40)(41) cos(C)

81 = 1600 + 1681 - 3280 cos(C)

81 = 3281 - 3280 cos(C)

-3200 = -3280 cos(C)

cos(C) = 3200 / 3280

cos(C) = 40 / 41

Step-by-step explanation:

You might be interested in
Use rounding to estimate the product.<br><br> 11.45 × 5
a_sh-v [17]

Answer:

57.3

Step-by-step explanation:

just rounded up one

8 0
3 years ago
Read 2 more answers
Find the volume of a cylinder with 14 inches height and 10.2 inches radius
marysya [2.9K]
4575.92 inches all u gotta do is multiply
4 0
2 years ago
A new test has been developed to detect a particular type of cancer. The test must be evaluated before it is put into use. A med
Troyanec [42]
The tree diagram of the problem above is attached
There are four outcomes of the two events,

First test - Cancer, Second Test - Cancer, the probability is 0.0396
First test - Cancer, Second Test - No Cancer, the probability is 0.0004
First test -  No Cancer, Second Test - There is cancer, the probability is 0.0096
First test - No cancer, Second Test - No cancer, the probability is 0.9054

The probability of someone picked at random has cancer given that test result indicates cancer is  \frac{0.0396}{0.0396+0.0096}= \frac{33}{41}

The probability of someone picked at random has cancer given that test result indicates no cancer is \frac{0.0396}{0.0004+0.9504} = \frac{99}{2377}

7 0
3 years ago
What is the range of the function f(x) = -2(6^x) +3?<br><br><br> Answer is B
Oksana_A [137]

Answer:

You are right

Step-by-step explanation:

5 0
3 years ago
Identifying Possible Triangles
Masja [62]

Answer:

3rd triangle can be constructed with dimensions 2,6,7.

Step-by-step explanation:

sum of any two sides > third side.

difference of any two sides < third side

1.

8+5=13 not >14 (no triangle.)

2.

7+8=15 not >15 (no triangle)

3.

2+6=8>7

2+7=9>6

7+6=13>2

7-2=5<6

7-6=1<2

6-2=4<7

so it is a triangle.

4.

6+3=9 not >10 (not a triangle)

5 0
2 years ago
Other questions:
  • 1/5x &lt;-3 <br> Solve the inequality and graph the solution
    9·2 answers
  • Graph the function xy+25=0
    7·2 answers
  • Find the greatest common factor of the<br> following monomials:<br> 2n 36n
    5·1 answer
  • Joey used
    12·1 answer
  • A 4 foot tree was planted in 2012 outside a high school. The tree grew continuously by 22% each year from that point. Find out w
    6·1 answer
  • Question 2 (1 point)
    7·2 answers
  • Complete the remainder of the
    5·1 answer
  • Mei's average score on the first six holes in a miniature golf game was 6. her average score on the next 12 holes was 3. what wa
    14·1 answer
  • Hi I need help can someone simplify this?
    5·2 answers
  • PLS HELP WILL MARK YOU BRAINLIEST! NO FAKE ANSWERS
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!