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
lesya692 [45]
1 year ago
7

Use the diagram and cosine function to find the value of x.

Mathematics
2 answers:
77julia77 [94]1 year ago
8 0

D

--

x=9.4cos(58°)

because the cosine function uses the ratio of the adjacent side to that of the hypotenuse.

9.4 is the hypotenus the ration is 58 degrees I believe

katen-ka-za [31]1 year ago
7 0

\\ \rm\Rrightarrow cosA=\dfrac{Base}{Hypotenuse}

\\ \rm\Rrightarrow cos58=\dfrac{x}{9.4}

\\ \rm\Rrightarrow x=9.4cos58

Option D

You might be interested in
What is the Inverse Equation<br><br>f(x) =6x-1 ?? please I need help!​
Scrat [10]

Answer:

f^{-1}(x)=\frac{x+1}{6}

Step-by-step explanation:

So we have the function:

f(x)=6x-1

To find the inverse function, switch x and f(x), change f(x) to f⁻¹(x), and solve for f⁻¹(x). Therefore:

f(x)=6x-1

Switch:

x=6f^{-1}(x)-1

Add 1 to both sides:

x+1=6f^{-1}(x)

Divide both sides by 6:

f^{-1}(x)=\frac{x+1}{6}

And that's our answer :)

5 0
3 years ago
Expansion Numerically Impractical. Show that the computation of an nth-order determinant by expansion involves multiplications,
posledela

Answer:

  • number of multiplies is n!
  • n=10, 3.6 ms
  • n=15, 21.8 min
  • n=20, 77.09 yr
  • n=25, 4.9×10^8 yr

Step-by-step explanation:

Expansion of a 2×2 determinant requires 2 multiplications. Expansion of an n×n determinant multiplies each of the n elements of a row or column by its (n-1)×(n-1) cofactor determinant. Then the number of multiplies is ...

  mpy[n] = n·mp[n-1]

  mpy[2] = 2

So, ...

  mpy[n] = n! . . . n ≥ 2

__

If each multiplication takes 1 nanosecond, then a 10×10 matrix requires ...

  10! × 10^-9 s ≈ 0.0036288 s ≈ 0.004 s . . . for 10×10

Then the larger matrices take ...

  n=15, 15! × 10^-9 ≈ 1307.67 s ≈ 21.8 min

  n=20, 20! × 10^-9 ≈ 2.4329×10^9 s ≈ 77.09 years

  n=25, 25! × 10^-9 ≈ 1.55112×10^16 s ≈ 4.915×10^8 years

_____

For the shorter time periods (less than 100 years), we use 365.25 days per year.

For the longer time periods (more than 400 years), we use 365.2425 days per year.

8 0
3 years ago
A direct variation does not need to go through the origin of the coordinate plane. True False
xxTIMURxx [149]
The answer would be true
5 0
3 years ago
A model scale is 1 cm = 8m.<br> If the actual object is 40 meters, the model is<br> ____ cm long.
Dovator [93]

Answer:

Mmmmmmmmmmmmm.............

Step-by-step explanation:

MI no sabo amigo perdon

8 0
2 years ago
Read 2 more answers
Solve by completing the square, please help​
Talja [164]

Answer:

 x = 4 + √ 38

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • Solve this quadratic equation 2x^2+x-5 = 0
    5·1 answer
  • What is the exact volume of the cone​
    10·1 answer
  • What is the horizontal asymptote of the function f(x)=(x-2)/(x-3)^2
    14·2 answers
  • Simplify 3 over 2 x 3 over 2 exact answer
    10·2 answers
  • PLZZZ HELP FAST What is the product of Three-fourths and Negative StartFraction 6 over 7 EndFraction? Negative StartFraction 7 o
    9·1 answer
  • Carmine wants to know how many square feet of carpeting he will need to buy to cover his family room floor. Which geometric meas
    15·1 answer
  • a circle has a radius of 4.5 inches find the length of the arc outlined by a central angle that measures 0.6pi radians
    7·1 answer
  • What is the approximate percent change in temperature that went down from 120 degrees to 100 degrees?
    15·2 answers
  • 4250cm ........... m?​
    9·2 answers
  • I need helpppp..................
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!