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
Mademuasel [1]
2 years ago
9

Find the value of 2abcosC.

Mathematics
2 answers:
Strike441 [17]2 years ago
6 0

Answer:

7

Step-by-step explanation:

a=2

b=2

c=1

2ab cos C=a²+b²-c²=2²+2²-1²=4+4-1=7

Mazyrski [523]2 years ago
4 0

Answer:

C

Step-by-step explanation:

Given

a² + b² - 2abcosC = c² ( subtract c² from both sides )

a² + b² - c² - 2abcosC = 0 ( add 2abcosC to both sides )

a² + b² - c² = 2abcosC

Here a = 2, b = 2, c = 1 , then

2² + 2² - 1² = 2abcosC

4 + 4 - 1 = 2abcosC , then

2abcosC = 7 → C

You might be interested in
Clara has 8 coins worth 17¢. if the coins are all dimes and pennies, how many dimes and pennies does she have?
Sliva [168]
Let x = the number of dimes
Let y =  the number of pennies.

There are 8 coins, therefore
x + y = 8        (1)

The coins are worth 17 cents, therefore
10x + y = 17     (2)

Subtract equation (1) from equation (2).
10x + y - (x + y) = 17 - 8
9x = 9
x = 1

From (1), obtain
y = 8 -x = 8 - 1 = 7

Answer: 1 dime, 7 pennies.

4 0
3 years ago
Read 2 more answers
Help me please its super easy
yanalaym [24]

Your answer would be the first option 10^5.

Hope this helped.

6 0
3 years ago
Read 2 more answers
What can you divide a2b5 by to get a quotient of 1?
Kitty [74]

9514 1404 393

Answer:

  a^2b^5

Step-by-step explanation:

Anything divided by itself is 1.

That is, anything multiplied by its reciprocal is 1. This value (the reciprocal of the expression) is called the "multiplicative inverse." Its value is that the product of an expression and its multiplicative inverse is 1, the multiplicative identity element. (Anything times 1 is itself.)

So, to get 1 as a product, multiply by 1/(a^2b^5), which is to say, divide by a^2b^5 to get 1 as a quotient.

8 0
2 years ago
Use ABC to find the value of sin A. <br> a. 12/37<br> b. 37/12<br> c. 35/37<br> d. 12/35
FromTheMoon [43]

Answer:

  a.  12/37

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you ...

  Sin = Opposite/Hypotenuse

  sin(A) = BC/AB = 12/37

4 0
3 years ago
Select all the expressions that are equivalent to 4(y+7) 4y+7 4y+28 3+1(y+7) 4y+4(7) 4+y+7 3(y+7)+(y+7) PLEASE GUYS I REALLY NEE
sasho [114]

Answer:

Step-by-step explanation:

4(y+7)=4(y)+4(7)

=4y+28

7 0
3 years ago
Other questions:
  • Brooklyn has a goal to save $8,000 to buy a new entertainment system. In order to meet that goal, she deposited $4,132.79 into a
    7·2 answers
  • What's the following recursive formula???
    9·2 answers
  • Find the area of the shaded region. Round the the nearest tenth.
    14·1 answer
  • A) 3/2=x/4<br>B) 2/3=x/4<br>C) 2/3=4/x<br>D) x/3=2/4​
    9·2 answers
  • Multiplying by which number is equivalent to finding 111%?
    7·1 answer
  • Write -0.04 as a fraction in simplest form<br>​
    10·1 answer
  • I need help answer these and show your work please I really need help I will make you brainily person and give you points.!!
    15·1 answer
  • B<br> Which pair of lines are skew?<br> CAE, DH<br> ET, EH<br> BC, CG<br> AG, FE<br> FE, BC
    7·1 answer
  • Identify whether the given numbers belongs to the given set. Natural Numbers Whole Numbers Integers Rational Numbers − 11 2.45 1
    13·1 answer
  • Could someone help me giving brainliest
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!