LolaSuRhearleBug
LolaSuRhearleBug LolaSuRhearleBug
  • 14-09-2016
  • Mathematics
contestada

How many solutions are there to the following system of equations?. . 2x – y = 2. –x + 5y = 3. A. 1 B. 0 C. 2 D. infinitely many

Respuesta :

caylus
caylus caylus
  • 14-09-2016
Hello,

[tex]\Delta=\begin{array}{|cc|}2&-1\\-1&5\end{array}=2*5-(-1)*(-1)=10-1=9\\ \Delta \neq 0 ==\ \textgreater \ 1\ solution\\ [/tex]

Answer A
Answer Link
HomertheGenius
HomertheGenius HomertheGenius
  • 16-09-2016
  2 x - y = 2
- x + 5 y = 3   / *2
----------------------
  2 x  -  y  =  2
+
- 2 x + 10 y = 6
-----------------------
           9 y = 8,  y = 8/9
2 x - 8/9 = 2
2 x = 2 + 8 /9
2 x = 26/9
x = 13/9
( x, y ) = ( 13/9,  8/9 )
Answer: A ) 1 solution. 
Answer Link

Otras preguntas

In its income statement for the year ended December 31, 2019, Sheridan Company reported the following condensed data. Operating expenses $ 759,720 Interest reve
Assume that on a standardized test of 100 questions, a person has a probability of 80% of answering any particular question correctly. Find the probability of a
What does the root tend mean?
What is the solution to 2 In x = 4 In 2?
The quotient of 6 cubed and 4 squared
What is the additive inverse of -9x? 1. -1/9x 2. 9x 3. -1x 4. 1x
Calculate the value of x in the illustration below.
Carrie and Kenny both play soccer. Kenny scored 3 times as many goals as Carrie. Together they scored 12 goals. Could Carrie have scored 2 goals? Why or why not
What are the possible steps involved in solving the equation shown? Select three options. 3.5 + 1.2(6.3 – 7x) = 9.38 Add 3.5 and 1.2. Distribute 1.2 to 6.3 and
What is the complete disappears of a species​