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
trapecia [35]
2 years ago
9

The tempature is -3 degress.The temperature is expected to decrease 2.5 degress each hour until the temperature reaches -18 degr

ess. How many hours will it take to reach -18? A 6hours
B 7 hours
C 7.2 hours
D 8.4 hours
Mathematics
1 answer:
Andrews [41]2 years ago
6 0

We can set this problem up as an algebraic equation, which we can then solve to find our answer.


We start at -3. So we can start our equation with that:

-3


However, this doesn't represent any change in temperature, just that we start at -3. To show change, we will use the variable x, where x stands for the number of hours. Each hour accounts for a change of -2.5 in degrees, meaning that we must multiply our x by -2.5. We can now add this term into our equation:

-3 - 2.5x


We are trying to find when we will reach -18 degrees, so we will set our entire equation equal to -18 and solve:

-3 - 2.5x = -18

-2.5x = -15

x = 6


It will take us 6 hours, or choice A.

You might be interested in
Solve 7 2 3 − ( 1 2 4 + 3 6 8 ) . Choose the number to complete the mixed number. Numbers may be used once or not at all. ASAP p
weqwewe [10]

Answer:

2\frac{5}{12} <em>is your answer.</em>

Step-by-step explanation:

7\frac{2}{3} -(1\frac{2}{4} +3\frac{6}{8} )\\\\\frac{23}{3} -(\frac{6}{4} +\frac{15}{4}) \\\\\frac{23}{3} -(\frac{21}{4})\\\\\frac{92-63}{12} \\\\\frac{29}{12} \\\\2\frac{5}{12}

6 0
2 years ago
Problem 1:
Allisa [31]

Answer:

It will cost $120.00

Step-by-step explanation:

8 0
3 years ago
A rental company rents big-screen televisions for $22 down plus $4 a day. If the final bill is $46, how many days did you rent t
Misha Larkins [42]

Answer:  6 days

Step-by-step explanation:

take 22 off of the final price 46-22=24

now divid 24 by 4

and u have 6

4 0
2 years ago
Please help on this problem
Harlamova29_29 [7]
Answer: EP is 12 and EO is about 10.91.

To find the length of EP, we can use the Pythagorean Theorem with the 2 legs of the right triangle it would form, EC and CP. CP would be 5 because it is the midpoint of the side.

5^2 + (EP)^2 = 13^2
EP = 12

Now, to find EO, we write and solve another Pythagorean Theorem equation using 12 for EP.

5^2 + (EO)^2 = 12^2
EO equals the square root of 119 or about 10.91.
6 0
3 years ago
If the m∠X = 34° and the m∠Z = 26°, what is the m∠Y? m∠Y = 26° m∠Y = 34° m∠Y = 60° m∠Y = 120°
Alik [6]
Answer is 120 because all of the angles add up to 180. 180-26-34= Y
8 0
3 years ago
Other questions:
  • What is the mean of the set of numbers? –14, –8, –1, 2, 6 A. –1 B. 2 C. 3 D. –3
    14·2 answers
  • 100 points and brainliest!!!!
    13·2 answers
  • Identify the type I error and the type II error that corresponds to the given hypothesis. The proportion of people who write wit
    5·1 answer
  • The perimeter of a rectangle is 30 cm. If one of its sides is decreased by 3 cm and the other side is increased by 5 cm, the are
    8·1 answer
  • Which of the following expressions is completely simplified?
    8·1 answer
  • Explain why y^2 = x (X input, y output) is not a function.
    15·2 answers
  • Which test would be used to show these
    10·1 answer
  • A university class has 22 students: 3 are nursing majors, 9 are psychology majors, and 10 are business majors. (Each student has
    14·1 answer
  • What is the area of a circle whose radius is 4 ft?
    12·1 answer
  • Write a function of the geometric sequence with a starting term of 8 and a common ratio of 2. Find the fourth term.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!