What are the solutions of the system? y=x^2-4.9x+4.4
y=1.1x-4.6 A. (–3, –7.9) and (3, –1.3)
B. (3, –1.3)
C. (–1.3, 3)
D. no solution

Question

What are the solutions of the system? y=x^2-4.9x+4.4
y=1.1x-4.6 A. (–3, –7.9) and (3, –1.3) 	
	B. (3, –1.3) 	
	C. (–1.3, 3) 	
	D. no solution

anonymous · Answer

I used the graphing calculator to show the Parabola and straight line. This is the EASY way out rather than solve algebraically. By inspection( looking for intersection of Parabola and straight line on graph)  the answer is B  (3, -1.3)|dw:1336467492080:dw|

anonymous · Answer

http://go.hrw.com/math/midma/gradecontent/manipulatives/GraphCalc/graphCalc.html

kropot72 · Answer

The algebraic way is easy, the reason being that substituting for y gives a quadratic that can be solved by inspection:
$$x ^{2}-6x+9=0$$
$$(x-3)(x-3)=0$$
x = 3 and by substitution y = -1.3