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
erik [133]
3 years ago
6

7/9-2n+1/9 simplify the fraction please help!

Mathematics
1 answer:
koban [17]3 years ago
7 0

Answer: -2*(9n-4)/9

Step-by-step explanation: The -2*(9n-4) is over the 9

You might be interested in
Newton's Law of Cooling states that the rate of change of the temperature of an object, T, is proportional to the difference of
maria [59]

Answer:

  305 °F

Step-by-step explanation:

The core temperature of the object after 4 hours can be found using an exponential decay formula to model the decay of the difference between core temperature and ambient.

<h3>Cooling Model</h3>

The solution to the differential equation described by Newton's law of cooling is the exponential equation ...

  y = ab^t +c

where 'a' is the initial core temperature difference from ambient, 'b' is the decay factor of that difference in 1 unit of time period t. 'c' is the ambient temperature.

For this problem, the ambient temperature is c=80, and the differences of interest are ...

  a = 1200 -80 = 1120

  b = (830 -80)/1120 = 75/112

Using these values in the model gives ...

  y = 1120(75/112)^t +80 . . . . . . where y(t) is the core temperature at time t

Note that units of time are hours.

<h3>Application</h3>

We want y when t=4.

  y = 1120(75/112)^4 +80 ≈ 1120(0.20108) +80 ≈ 305.212

The core temperature after 4 hours is about 305 °F.

__

<em>Additional comment</em>

The differential equation will have a solution of the form ...

  T-T_R=(T_0-T_R)e^{kt}

where k = ln(75/112) ≈ -0.40101

In the above, we defined b = e^k = 75/112. Accuracy with this fraction can be better than using a truncated value of k.

5 0
2 years ago
What is the square root of 38 to the nearest tenth
Ipatiy [6.2K]
6.16441 which rounds to 6.2 in the tenths place

5 0
3 years ago
PLEASE HELP ME<br> EXTRA POINTS
kati45 [8]
DONT TRUST ANY LINKS! THEY ARE USED TO STEAL PERSONAL INFORMATION
4 0
3 years ago
5 • 10^5 is how many times as large as 1 • 10^5​
damaskus [11]

Answer:

5 times larger

Step-by-step explanation:

5*10^5 = 500,000

1*10^5 = 100,000

500,000/100,000 = 5

3 0
3 years ago
Find the x intercepts of the parabola with vertex (-1,-16) and y intercept (0,-15)
Arlecino [84]
<span> first, write the equation of the parabola in the required form: </span>
<span>(y - k) = a·(x - h)² </span>

<span>Here, (h, k) is given as (-1, -16). </span>
<span>So you have: </span>
<span>(y + 16) = a · (x + 1)² </span>

<span>Unfortunately, a is not given. However, you do know one additional point on the parabola: (0, -15): </span>

<span>-15 + 16 = a· (0 + 1)² </span>
<span>.·. a = 1 </span>

<span>.·. the equation of the parabola in vertex form is </span>
<span>y + 16 = (x + 1)² </span>

<span>The x-intercepts are the values of x that make y = 0. So, let y = 0: </span>

<span>0 + 16 = (x + 1)² </span>
<span>16 = (x + 1)² </span>

<span>We are trying to solve for x, so take the square root of both sides - but be CAREFUL! </span>

<span>± 4 = x + 1 ...... remember both the positive and negative roots of 16...... </span>

<span>Solving for x: </span>
<span>x = -1 + 4, x = -1 - 4 </span>
<span>x = 3, x = -5. </span>

<span>Or, if you prefer, (3, 0), (-5, 0). </span>
8 0
3 years ago
Other questions:
  • Which property would you use first, in solving the equation -4/5x = -2?
    6·1 answer
  • Which of the following values are solutions to the inequality −6≤1+3x?
    10·1 answer
  • Simplify ratio 40:28
    10·1 answer
  • a warehouse store sells 5.5-ounce cans of tuna in packages of 6. a package of 6 cans costs $9.24. the store also sells 6.5-ounce
    8·2 answers
  • In 9 days a group of workers can plant 54 acres what’s there rate in acres per day
    10·2 answers
  • Tch, hi ok help. thanks bye
    9·1 answer
  • 91,007,500 in scientific notation
    9·2 answers
  • I’ll give brainlist and all 5 stars!
    10·2 answers
  • What's the answer? I don't get it<br><br>- 1/2 X + 3 = 1/4 (X-12)
    5·1 answer
  • You ppl are cowards and trash asf everyone are psychopath and dumm<br><br><br>​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!