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
katrin2010 [14]
2 years ago
5

The temperature was 78°F at 3 P.M. Each hour for

Mathematics
1 answer:
polet [3.4K]2 years ago
6 0

Answer:

  66 °F

Step-by-step explanation:

At 4 P.M., the temperature had decreased by 3° from the temperature at 3 P.M., so was ...

  4 P.M. temp = 78 °F -3° = 75 °F

This was repeated until 7 P.M.

  5 P.M. temp = 75 °F -3° = 72 °F

  6 P.M. temp = 72 °F -3° = 69 °F

  7 P.M. temp = 69 °F -3° = 66 °F

The temperature at 7 P.M. was 66 °F.

__

Of course the repeated subtraction can be simplified using multiplication. The subtraction of 3° four times is equivalent to the subtraction of . . .

  (3°)(4) = 12°

That is, the temperature at 7 P.M. is ...

  78 °F -3°×4 = 78 °F -12° = 66 °F

You might be interested in
Find an ordered pair (x,y) that is a solution to the equation.<br> x-3y=9<br> (x,y)= ?
Gemiola [76]

Answer:

(9,-3)

Step-by-step explanation:

7 0
2 years ago
What is the simplest form of the expression (14.2a + 9.8b) – (13.1b – 0.2a) – (3.7a + 4.8b)?
makvit [3.9K]

The first; 10.7a-8.1b

5 0
3 years ago
Read 2 more answers
Use rounding or compatible numbers to estimate the difference 192-78
pogonyaev
The answer would be 110
5 0
3 years ago
Find the measurement of angle 7
Inessa [10]

Answer:

76 degrees

Step-by-step explanation:

find angle 5 by subtracting 76 from 180 to get 104 degrees

the find angle 7 by subtracting 104 from 180 to get 76

180-76 =104

180-104=76

6 0
2 years ago
What is the solution to the equation 2 ( 5 + 2 x ) = − 4 + 6 x ? x = 3 2 x = 3 2 x = 7 6 x = 7 6 x = 2 x = 2 x = 7 x = 7
soldi70 [24.7K]

Answer:

7=x

Step-by-step explanation:

multiply 5 and 2x by 2, you'll then have (10+4x)=-4+6x. Then add 4 to both sides and you have (14+4x)=6x. Subtract 4x from both sides and that'll get you 14=2x and you divide 2 from each side to get x by itself so 7 is your answer.

5 0
2 years ago
Other questions:
  • Question is in the picture and answer
    13·1 answer
  • Sonia graphs the equations y = –x2 + 4x and y = x – 4 to solve the equation –x2 + 4x = x – 4. Her graph is shown below.
    5·2 answers
  • Can someone help me with this and answer asap.
    12·2 answers
  • Refer the diagram at the right. identify each angle pair as adjacent, vertical, or neither 7-12
    6·1 answer
  • Use dimensional analysis to convert 12 kilometers to feet.
    13·2 answers
  • Another day. Another question... :)
    8·1 answer
  • We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando
    5·1 answer
  • The function f(x) = 20(3)x represents the growth of a fish population every year in a local lake. Jesse wants to manipulate the
    7·2 answers
  • For BOYS only, 12*12+13+78-90+56
    10·2 answers
  • Kelly runs a bakery that sells Chocolate Blizzards and Mint Breezes. The bakery must make at least 25 dozen and at most 45 dozen
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!