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
prisoha [69]
3 years ago
12

In △ABC,a=34, b=18, and c=17. Find m∠A. A. 14.1 B. 132.6 C. 152.5 D. 101.5

Mathematics
1 answer:
igomit [66]3 years ago
8 0

Answer:

C.  m < A = 152.5 degrees.

Step-by-step explanation:

Use the Cosine Rule:

a^2 = b^2 + c^2 - 2.b.c.cos A

34^2 = 18^2 + 17^2 - 2.18.17 cos A

2.18.17 cos A = 18^2 + 17^2 - 34^2

cos A =  (18^2 + 17^2 - 34^2) / (2.18.17)

cos A = -0.88725

m < A = 152.5 degrees.

You might be interested in
I WILL MARK YOU THE BRAINLIEST!!!!!!!!! AND GIVE LOT'S OF POINTS On a road trip, a family drives 350 miles per day. How many day
UNO [17]
The family needs 4 days to cover 1,400 miles
4 0
3 years ago
The sum of two numbers is 31.5. The difference is 5.25. Find the numbers
SVEN [57.7K]
The numbers can be 5.25 and 26.25
6 0
3 years ago
How will you know if the function is exponential given its equation?
Mashcka [7]

Answer: the "m" value (if using y=mx+b) will have" x" as an exponent

3 0
3 years ago
Read 2 more answers
Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. Whe
Rama09 [41]

You can see how this works by thinking through what's going on.

 

In the first year the population declines by 3%.  So the population at the end of the first year is the starting population (1200) minus the decline: 1200 minus 3% of 1200.  3% of 1200 is the same as .03 * 1200.  So the population at the end of the first year is 1200 - .03 * 1200.  That can be written as 1200 * (1 - .03), or 1200 * 0.97

 

What about the second year?  The population starts at 1200 * 0.97.  It declines by 3% again.  But 3% of what???  The decline is based on the population at the beginning of the year, NOT based no the original population.  So the decline in the second year is 0.03 * (1200 * 0.97).  And just as in the first year, the population at the end of the second year is the population at the beginning of the second year minus the decline in the second year.  So that's 1200 * 0.97 - 0.03 * (1200 * 0.97), which is equal to 1200 * 0.97 (1 - 0.03) = 1200 * 0.97 * 0.97 = 1200 * 0.972.

 

So there's a pattern.  If you worked out the third year, you'd see that the population ends up as 1200 * 0.973, and it would keep going like that.

 

So the population after x years is 1200 * 0.97x

5 0
3 years ago
Sathish is going on a 210021002100-kilometer road trip with 222 friends, whom he will pick up 150150150 kilometers after he begi
Zigmanuir [339]
Bro I’m rly sorry but I don’t know the answer to this
3 0
2 years ago
Other questions:
  • If the function graphed is f(x), find f(1)
    13·1 answer
  • ANSWER PLZ QUICK AND FAST
    12·1 answer
  • Write 850 as the product of its prime factor
    11·1 answer
  • Jean was asked to round a number to the nearest hundred she correctly wrote 32,700 what number could be the number jean was aske
    11·1 answer
  • Who knows the answer?
    10·1 answer
  • What is the answer to 54x^2-144x
    10·2 answers
  • Pls help ill give brainliest
    7·1 answer
  • Susie watched 1/4
    15·1 answer
  • INPORTANT PLS HELP<br><br> Find the area of the figure.<br><br> The area is( )square feet.
    9·1 answer
  • Samantha is solving the linear equation 15+ 5x - 9 = 5x + 8 - 4x. Her next two steps are
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!