Answer:
Step-by-step explanation:
hello :
1) the system is : y=5x+4
y = 2x+1
so :5x+4 =2x+1
5x-2x=1-4
3x= -3 so : x= -1 but y =2x+1 put x=-1 you have : y =-1
the solution : (x,y) =( -1, -1)
2) the system is : x + y = 4
4x -y = 1
means : y = - x+4 (line red)
y= 4x-1 (line blue)
graficly : intrsection is : (x,y) =(1 ,3 )
Answer:
<em>y = - </em>
<em> x + </em>
<em> </em>
Step-by-step explanation:
(6, 4)
(1, 8)
m = 
= -
y - 4 = - ( x - 6 )
<em>y = - </em><em> x + </em> ⇔ y = - 0.8x + 8.8
Answer:
53&8
Step-by-step explanation:
38-23=15
23+15+15=53
23-15=8
(5x³ + 4x²) - (6x² - 2x - 9)
-1(6x²) -1(-2x) -1(-9) = -6x² + 2x + 9
5x³ + 4x² - 6x² + 2x + 9
5x³ - 2x² + 2x + 9 Choice D.
