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
amm1812
3 years ago
7

In a local city, the temperature at noon is -3C The temperature is expected to decrease by 2.5C each hour until the temperature

reaches -18C How many hours will it take for the temperature to reach-18C?
Mathematics
2 answers:
LiRa [457]3 years ago
7 0

Writing the equation that governs this situation:


-3C - (2.5C/hr)x = -18C


Simplifying, -3 - 2.5x = -18, or 3 + 2.5x = 18


Combining like terms: 2.5x = 18-3 = 15


Then x = 15/2.5 = 6. The temp. will reach -18C after 6 hours.

Masja [62]3 years ago
3 0

Answer:

After six hours temperature in the city should be -18 °C.

Step-by-step explanation:

Initial temperature is -3 °C.  

Rate of temperature decreasing is 2.5 °C/hour. It means negative value.

Final temperature should be -18 °C.

If we write those data as equation we have:

(-3 °C - 2.5 (°C/h)* t) = -18 °C

We can isolate the value of t, t will be the total hours.  

-2.5 t = -18 + 3

-2.5 t = -15

t = (-15)/(-2.5) = 6  

t = 6 hours.

After six hours temperature in the city should be -18 °C.  

You might be interested in
Which equation is the inverse of y=100-x2
postnew [5]

Answer:

f^-1(x)=100-x

Step-by-step explanation:


4 0
3 years ago
Read 2 more answers
What is the slope of the line that passes through the points (2,3) and (8,6)
Ugo [173]

Answer:

3/6

Step-by-step explanation:

slope is rise over run so y-axis is rise x-axis is run. that gives me the answer

8 0
3 years ago
Which equations are equivalent to -1/4(x)+3/4=12? Select all that apply.
ELEN [110]

Answer:

B and E

Step-by-step explanation:

3 0
3 years ago
Work out the value of 4(2x+3y) when x=8 and y=-3
meriva
4(2 x 8 + 3 x (-3))
4(16 + (-9))
4(7)
=28

8 0
2 years ago
What is 3969=x•10.5%•9/12
RSB [31]

Answer:

3969 = 0.07875 x

4 0
3 years ago
Other questions:
  • Which of the following is the complete list of roots for the polynomial function f(x)(x^2+2x-15)?–5, 3 –5, 3, –4 + i, –4 – i –5,
    8·2 answers
  • What does 0 mean in a number line
    14·1 answer
  • On the packaging for a triangular sail, the edge measurements for the sail are listed as 7ft x 15ft x 17ft without unfurling the
    7·2 answers
  • Find each missing term.<br> p:4 = 9:12<br> Explain step by step
    9·1 answer
  • George tells you that when variables are in the denominator, the equation four over five plus three over x equals one over two b
    7·2 answers
  • You are making luan arrangements for a birthday party. There are 16 white balloons and 24 red balloons each arrangement must be
    12·1 answer
  • The mean of five numbers is 8.
    14·1 answer
  • Tell whether the ratios 6/15 and 4/10 are proportional.
    14·1 answer
  • Find 5.4 - 7.1 may you guys help me?
    10·1 answer
  • HELPP PLEASE ! This mapping shos a functional reationship.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!