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
svet-max [94.6K]
2 years ago
5

Which expression can be used to find measure angle R

Mathematics
1 answer:
Novay_Z [31]2 years ago
4 0

Answer:

cos-1(-4/14)

Step-by-step explanation:

If

4.5=r

3.5=s

2=t

By law of cosines:

r^{2}=s^{2}+t^{2}  -2st cosR\\\\CosR= \frac{r^{2} -s^{2} -t^{2} }{-2st}  \\\\R=cos^{-1} (\frac{(4.5)^{2}-3.5^{2} -2^{2}  }{-2(3.5)(2)} )\\R= cos^{-1} (-\frac{4}{14}  )

You might be interested in
Isabel has 6.75 bags of coffee. A full bag weighs 5.2 pounds. How many pounds of coffee does Isabel have? *
lisabon 2012 [21]

Answer:

35.1

Step-by-step explanation:

6.75x5.2=35.1

3 0
2 years ago
19. (9+2) X 6 -5=<br> Help
Nata [24]

Answer:

61

Step-by-step explanation:

Use PEMDAS (Parenthesis first, Exponents second, Division/Multiplication third, Addition/Subtraction last)

(9+2) x 6 - 5

11 x 6 - 5

66 - 5

61

6 0
3 years ago
Read 2 more answers
What is the inverse of y = 16x^2 + 1
tankabanditka [31]
X = 16y^2 + 1
x - 1 = 16y^2
(x - 1)/16 = y^ 2
( (x-1) / 16 ) ^1/2 = y
( (x-1) ^ 1/2 ) / 4 = y
4 0
3 years ago
I need help with this
tankabanditka [31]
-2/2 and -2/-4 hoppeee it helps
4 0
3 years ago
The price of a shirt is reduced from $27 to $20
vfiekz [6]

Answer:

- 7 dollars

Step-by-step explanation:

27 - 7 = 20

5 0
3 years ago
Other questions:
  • Paul's car will go 49 kilometers on 7 tanks. Paul wants to know how fuel efficient the car is.
    11·2 answers
  • I need the answer right now
    14·1 answer
  • What Is the answer to -0.35 times -1 3/7
    15·1 answer
  • Find the values if x and y
    12·1 answer
  • Write 1/10^2 using exponents
    6·1 answer
  • The quadratic function modeling the height of a ball over time is symmetric about the line , where t is time in seconds. Which s
    6·1 answer
  • Plz need help now plz 11 points
    15·2 answers
  • Write a mathematical expression for the word expression. Seven times a number plus one
    5·2 answers
  • PLSSS HELP<br> 1.Find the surface area<br> 2.Find the volume
    11·2 answers
  • I NEED HELP ON THIS QUESTION (I will give a Brainlist to the best one no links please.)
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!