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
arlik [135]
3 years ago
14

Use the substitution method to solve this system. y = x − 4 and -2x + y = − 7

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
8 0
-2x+x-4=-7 , -1x=-3, x=3. y=3-4, y=-1
You might be interested in
Which of the following will result in a rational answer? Which number is not a rational number?
defon

Answer:

what are the #

Step-by-step explanation:??

3 0
3 years ago
(-8) x 10 x 9 is equal to
Sergio [31]

Answer:

-720

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Can you please help me with this problem.
Nimfa-mama [501]

Answer:

C

Step-by-step explanation:

Calculator did it lol

5 0
2 years ago
A car requires 22 litres of petrol to travel a distance of 259.6 km.Find
Anon25 [30]

Answer:

Step-by-step explanation:

1. A car requires 22 litres of petrol to travel a distance of 259.6 km

what is the distance that the car can travel on 63 ltr of petrol

22ltr = 259.6km

63ltr=

cross multiply

{63 x 259.6}/22 = 16354.8/22 = 743.4 km

A car requires 22 litres of petrol to travel a distance of 259.6 km, it would require 63 ltr of petrol to travel 743.4km

2. To travel a distance of 2013.2 km

we would need to calculate the amount of fuel

A car requires 22 litres of petrol to travel a distance of 259.6 km

what amount of fuel would it require to travel 2013.2km

22ltr = 259.6km

xltr = 2013.2km

x is the value of petrol to cover 2013.2km

cross multiply

(2013.2 x 22)/259.6

44290.4/259.6 = 170.610169492≈170.6 ltr

A car requires 22 litres of petrol to travel a distance of 259.6 km, it would require 170.6 ltr of petrol to travel 2013.2km

if 1ltr is $1.99

170.6 ltr is (170.6 x 1.99)/1 = $339.494≈$339.5

The price of fuel consumed for 2013.2 km at 1 liter of petrol at $1.99 is $339.5

5 0
2 years ago
Expand this expression (x-y)²<br>​
pochemuha

Answer:

x^2 - 2xy + y^2.

Step-by-step explanation:

(x - y)^2

= (x - y)(x - y)

= x(x -y) - y(x - y)

= x^2 - xy - xy + y^2

= x^2 - 2xy + y^2.

8 0
2 years ago
Other questions:
  • Simplify the expression below.
    8·1 answer
  • The sum of the first 666 terms of a geometric series is 15{,}62415,62415, comma, 624 and the common ratio is 555.
    5·1 answer
  • Give the digits in the hundred thousands place and the ten thousands place.<br> 175,384
    8·1 answer
  • Name the salt formed when magnesium reacts with hydrochloric acid
    14·1 answer
  • To win at LOTTO in one​ state, one must correctly select 5 numbers from a collection of 61 numbers​ (1 through 61 ​). The order
    11·1 answer
  • 1 3/7 plus 1 5/7 is how much in all
    10·1 answer
  • Halpppppppppppp i don't understand this... &lt;:
    13·1 answer
  • WILL MARK BRAINLEST PLS HELP
    8·2 answers
  • Derek scored a 15/25 on his math test and Meredith scored a 8/14 on her science test. Who had the best score? Explain.
    11·2 answers
  • In the diagram below of triangle UVW, X is a midpoint of UV and Y is a midpoint of VW. If mZY XV = 3x + 48, and mZWUX = x + 62,
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!