multipale choice question The value of x and y in linear equations 2x + y = 14 x
ID: 3113025 • Letter: M
Question
multipale choice question
The value of x and y in linear equations 2x + y = 14 x - 2y = -3 5 , 4 B. 5 , 3 C. 5 , 2 D. 5 , 1 The value of x and y in linear equation x + 2y = 7 3x - 2y = 5 3 , 4 B. 3 , 3 C. 3 , 2 D. 3 , 1 The value of x and y in linear equation 3x – 2y = 8 5x – y = 11 2 , 11 B. 11 , 3 C. 5 , 11 D. 2 ,10 The value of x , y, and z in the system 3x - 2y - z = -4 5x + y + z = 17 4x - 3y - 2z = -9 A. 1, 2, 3 B. 3, 4, 5 C. 2, 3, 4 D. 4, 5, 6 The value of x , y, and z in the system 3x - 3y - z = 4 x + 9y + 2z = 16 x - y + 16z = 14 A. 4, 2, 3 B. 3, 1, 2 C. 2, 1, 1 D. 4, 5, 6 The value of x , y, and z in the system x - y + 2z = 4 3x + 2y - 4z = 2 x + y + z = 3 A. 4, 2, 3 B. 3, 1, 2 C. 2, 0, 1 D. 4, 5, 6 The solution set in the system of equation x2 –y2 = 16 x - 2y = - 1 A. (-13/3 ,-5/3 ) ,( 5 ,3 C. (-13/3 ,-5/3 ) ,( 4 ,3 ) B. (-13/3 ,-5/3 ) ,( 2 ,3 ) D. (-13/3 ,-5/3 ) ,( 1 ,3 ) The solution set in the system of equation - x2 + y2 = 5 2x2 + y2 = 17 A. (-2, -3), (2, -3), ( -2,3), (-2, -3) C. (2,3), (-2, -3), ( -2,3), (-2, -3) (2,3), (2, -3), ( -2,3), (-2, -3) D. (2,3), (2, -3), ( -2,-3), (-2, -3) The solution set in the system of equation x2 + y2 = 25 x2 - y2 = 7 (-2, -3), (2, -3), ( -2,3), (-2, -3) C. (4,3), (4, -3), ( -4,3), (-4, -3) . (2,3), (2, -3), ( -2,3), (-2, -3) D. (3, 3), (2, 3), ( 2,-3), (-2, -3) The solution set in the system of equation x2 + y2 = 13 x2 - y2 = 5 (-2, -3), (2, -3), ( -2,3), (-2, -3) C. (4,3), (4, -3), ( -4,3), (-4, -3) (2,3), (2, -3), ( -2,3), (-2, -3) D. (3, 2), (3, -2), ( -3,2), (-3, -2)
Explanation / Answer
1)given equations2X+Y=14
X-2Y=-3
NOmulyiply below eq with 2..so 2X-4Y=-6
SUBTRACTING TWO EQS WE HAVE
5Y=20
Y=4
SO X=5
(X,Y)=(4,5)
2)GIVEN EQS X+2Y=7 AND 3X-2Y= 5
NOWADDING 1 AND 2 WE HAVE 4X=12
X=3
SO Y=2
(X,Y)=(3,2)
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