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
ira [324]
3 years ago
14

Solve the following system of equations:

Mathematics
1 answer:
MariettaO [177]3 years ago
3 0

Answer:

(1,3)

Step-by-step explanation:

\sf Answer\begin{cases} \sf \rightarrowtail \:  - 2x + y = 1 \dots(1) \\  \sf \rightarrowtail \:  - 4x + y =  - 1 \dots(2) \\ \sf 2 \times (1) \implies - 4x + 2y  = 2 \\ \sf 1 \times (2) \implies - 4x + y =  - 1 \\  \bf \star \: substracting \: both \\  \sf \rightarrowtail \: y = 3 \\  \sf \rightarrowtail \: -2x+(3)=1 \\ \sf \rightarrowtail \: -2x=-2 \\  \sf \rightarrowtail \: x=1\end{cases}

You might be interested in
Given the function f(x)=X^2- 3x, find f(-4)
sladkih [1.3K]
Put -4 in place of x
-4 to the second power is 16 so it would be 16-(-12)= 28
5 0
2 years ago
Write the exponential function that passes through the points (3, 10) and (5, 40)
tigry1 [53]

Answer:

  y = (5/4)2^x

Step-by-step explanation:

The function value increases by a factor of 40/10 = 4 when x increases by 2. The function can be written as ...

  y = (reference value)·(growth factor)^((x -reference)/(change in x for growth factor))

  y = 10·4^((x-3)/2) . . . . . . using point (3, 10) as a reference

This can be simplified to ...

  y = 10·2^(x -3) = 10/8·2^x

  y = (5/4)2^x

6 0
3 years ago
Pls help its a pretty easy question and quick points
diamong [38]
I’m not sure but it’s either going to be b or c
7 0
3 years ago
Read 2 more answers
Show √7 , √5 on a number line. <br><br>please hurry up my cissy and oppa<br>​
tankabanditka [31]

Answer:

Draw the number line like in the picture.

Step-by-step explanation:

√5 is about 2.236, meaning it's kind of close to 2.25.

√7 is about 2.646, meaning it's very close to 2.625.

5 0
3 years ago
The Unit Circle
Mashcka [7]

Answer:

A. X-coordinate

Step-by-step explanation:

I calculated it logically

8 0
3 years ago
Read 2 more answers
Other questions:
  • Evaluate the following expression b=3 c=-3 (b-c)(c+2)
    11·1 answer
  • Please help - and explain
    14·1 answer
  • Find the fourth roots of 16(cos 200° + i sin 200°).
    11·1 answer
  • Please help, thank you:))
    13·1 answer
  • Yasmin went to the store and bought 3 1/2 pounds of ground beef for $11.20. How much did the ground beef cost per pound?
    12·1 answer
  • A ladder leans against the side of a house. The angle of elevation of the ladder is 65° when the bottom of the ladder is 12 ft f
    15·1 answer
  • Convert 8.4 km to minutes​
    11·1 answer
  • Factorise the following expression :​
    11·1 answer
  • Evaluate each value expression for the given value of x: x-5 , x - =22<br> pls fast
    15·1 answer
  • Pls Answer This Ill Rate 3 stars and giva a thanks if u answer and btw this is a 15 point questions PLS ANSWER I BEG
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!