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
oksian1 [2.3K]
3 years ago
9

The temperature was -5 f and then fell 8 f

Mathematics
1 answer:
Aleksandr [31]3 years ago
3 0

Answer:

-13

Step-by-step explanation:

if you're asking what the new temperature would be.

then -5 -8=-13

You might be interested in
Help please! im begging you D:​
Vera_Pavlovna [14]

Answer:

it c

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Pls tell me what is x^2-3(x+2)
GREYUIT [131]

Answer:

x^2-3x-6

Step-by-step explanation:

x^2- (3*x)-(3*2)

x^2-3x-6

7 0
2 years ago
The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min
Maslowich

Answer:

67.3°C

Step-by-step explanation:

A = 25, T(0) = 100, T(1) = 90, find T(4)

dT/dt = -k(T - A)

d(T - A)/dt = -k(T - A)

d(T - A)/(T - A) = -k dt

ln(T - A) = lnC - kt

T(t) -A=Ce^{-kt}\\T(t) = A + Ce^{-kt} = 25 + Ce^{-kt}\\T(0) = 25 + C = 100\\C=75

T(t) = 25 + 75e^{-kt}\\T(1) = 25 + 75e^{-k} = 90\\75e^{-k} = 65\\e^{-k} = \frac{65}{75}, k = ln\frac{75}{65} = 0.1431\\T(t) = 25+75e^{-0.1431t}\\T(4) = 25+75e^{-0.1431\times4} = 67.3

4 0
2 years ago
Which ratio is equivalent to 12 over 14
Alecsey [184]
12/14=6/7

Because you divide by 2. 
5 0
3 years ago
Read 2 more answers
Vanessa wants to purchase a new cell phone plan. The two plans from which she can choose are shown below. Vanessa used the syste
user100 [1]

Answer:

2. 325 minutes.

Step by step explanation:

We will substitute our given number of minutes in our both equation one by one to find the correct option.

1. Let us substitute m= 775 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 775

CA=22+100.75=122.75

CB=44+0.09(m-100)

CB=44+0.09(775-100)    

CB=44+0.09\cdot675

CB=44+60.75=104.75

104.75\neq122.75

We can see that both plans have different costs , therefore, 1st option is incorrect.

2. Let us substitute m= 325 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 325

CA=22+42.25=64.25

CB=44+0.09(m-100)

CB=44+0.09(325-100)

CB=44+0.09\cdot 225

CB=44+20.25=64.25

64.25=64.25

When Vanessa has used the phone for 325 minutes, the cost for Plan A and the cost for Plan B will both be $64.25.Therefore, 2nd option is correct choice.

3. Let us substitute m= 32.5 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 32.5

CA=22+4.225=26.225

CB=44+0.09(m-100)

CB=44+0.09(32.5-100)

CB=44+0.09\cdot -67.5

CB=44-6.075=37.925    

37.925\neq26.225

4. Let us substitute m= 764 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 764

CA=22+99.32=121.32

CB=44+0.09(m-100)

CB=44+0.09(764-100)

CB=44+0.09\cdot 664

CB=44+59.76=103.76  

121.32\neq103.76

Therefore, 4th option is incorrect.




3 0
3 years ago
Other questions:
  • Lucy bought 9 yards of ribbon on a spool. She cut the ribbon into 1/2 yard pieces, which equation represents the number of piece
    6·1 answer
  • Find the total surface area.<br> Thanks!
    7·2 answers
  • (3ft = 1yard) how many yards are in 81 feet ?
    14·2 answers
  • 34 - (6.78+2.54)= how do you solve this
    12·2 answers
  • Tony is 4 years younger than his brother josh and two years older than his sister Cindy. Tony also has a twin brother, Evan. All
    8·1 answer
  • Richard wants to join a gym. Dynamic Gym has a membership fee of $50 and costs $35 each month. Cheater Fitness has a membership
    9·1 answer
  • Zara travelled in a train moving at an average speed of 120km/h and covered a distance of 40km towards East. i. Calculate the ti
    5·2 answers
  • HELP ME FOR BRAINLIEST !!!!!!!!!!!!!!!!!!!!!!
    10·1 answer
  • PLZZ HELPP ILL GIVE BRAINLIST
    12·2 answers
  • Simplify (7/3 multiplied by 11/3) divided by 1/3
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!