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
Otrada [13]
3 years ago
11

Question: Solve the system by the substitution method. y = -4x - 10 2x + 5y = -14

Mathematics
1 answer:
Georgia [21]3 years ago
3 0
Y=-4x-10
2x+5y=-14

2x+5(-4x-10)=-14
2x-20x-50=-14
-18x=36
x= -4

y=-4(-4)-10
y=16-10
y=6
You might be interested in
Which digit is in the tenths place of 36
Volgvan
The digit would be 0 if its just 36
3 0
2 years ago
Read 2 more answers
Help ASAP and pls tell me how thanks
bulgar [2K]
I have no clue ooooo mmmmyyyyy goooshhhh
6 0
3 years ago
What landmarks are located in East India?
Setler79 [48]

Answer:

Mehrangarh Fort.

Amber Fort. Located on the outskirts of Jaipur, the Amber Fort (also known as the Amer Fort) is a landmark of phenomenal beauty. ...

Jaisalmer Fort.

Step-by-step explanation:

7 0
3 years ago
A pan of warm water (46∘ Celsius) was put in a refrigerator. After 15 minutes, the water's temperature was 27∘ C; 15 minutes aft
Cloud [144]

Answer:

The refrigerator was at around 13 ∘C

Step-by-step explanation:

Newton's Law of Cooling:

The rate of change of a body temperature  (amount of heat loss/time of loss) is directly proportional to the difference between its own temperature and the surroundings.

\frac{T(t2)-T(t1)}{t2-t1} = -h (T(t2) - Tenv)

T ⇒ temperature

t ⇒ time

Tenv ⇒refrigerator temperature

\frac{T(t2)-T(t1)}{t2-t1} ⇒ rate of change of he temperature

-h ⇒ constant of proportionality (negative because the temperature is decreasing inside the refrigerator)

We have 3 points:

time (minutes) - Temperature (∘ C)

0 (when the pan was put in the refrigerator) - 46

15 (after 15 minutes) - 27

30 (15 minutes after the first 15 minutes) - 19

\frac{27 - 46}{15 - 0} = -h (27 - Tenv)

\frac{19 - 27}{15 - 0} = -h (19 - Tenv)

Now we have a system of two equations and two variables

\frac{-19}{15} = -h (27 - Tenv)\\ \frac{19}{15} = h (27 - Tenv)\\ \frac{19}{15(27 - Tenv)} = h

\frac{19 - 27}{15 - 0} = -h (19 - Tenv)\\\frac{-8}{15} = -h (19 - Tenv)\\\frac{8}{15} = h (19 - Tenv)\\\frac{8}{15} = \frac{19}{15(27 - Tenv)} (19 - Tenv)\\8(27 - Tenv) = 19 (19 - Tenv)\\216 - 8 Tenv = 361 - 19 Tenv\\19 Tenv - 8 Tenv = 361 - 216\\11 Tenv = 145 \\Tenv = 145/ 11\\Tenv = 13. 18

The refrigerator was at around 13 ∘C

6 0
3 years ago
Help... Jordan earns five dollars per hour babysitting. Each week he babysits six hours during the week, in four hours on the we
Alekssandra [29.7K]

Answer:

well what would you do to figure it out?

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Lia must work at least 5 hours per week in her family’s restaurant for $8 per hour. She also does yard work for $12 per hour. Li
    10·1 answer
  • In 1992, there were 120 students in the freshmen class. in 2005, there were 224. find the rate of change from 1992 to 2005.
    12·1 answer
  • x = 4y - 2 x - 3y = 6 If you were going to solve this equation by substitution, what would your first step look like?
    11·1 answer
  • I need to solve for x
    14·2 answers
  • Solve x and y x/5+y/6=12
    6·1 answer
  • Triangle MNO ~ triangle PRQ. If <br> 89o<br> 69o<br> 79o<br> 99o
    12·1 answer
  • The graph shows the approximate median annual earings for five occupations. About how much less does a cook earn than a teller?
    8·2 answers
  • Which of these expressions is equivalent to 3(x-2)
    10·1 answer
  • A rectangular prism has volume 5,760 cubic meters, length 8 meters, and width 36 meters. Find its height, in meters.
    7·1 answer
  • Hello :D (First person to answer gets brainly)​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!