Answer:
Step-by-step explanation:
Enter values of which highlighted variable?
Answer:
See below
Step-by-step explanation:
If you factor 
you get 
= 
= 
That's where the a comes in
Not sure if that answers your question
Answer:
line1:y=2x+3
Gradient1=2
Let line2 be the line passes through (-4,1)and perpendicular to line1.
Because line2 and line1 are perpendicular, (gradient of line2) (gradient of line1) =-1
Gradient of line2=-1/2
Equation of line2:y-y1 =m(x-x1)
:y-1 =(-1/2)[x-(-4)]
:(y-1)(-2)=(x+4)
:-2y+2 =x+4
:-2y+2-x-4=0
:-x-2y-2 =0
:x+2y+2 =0
*notes:gradient=m
Answer: 4.3
Step-by-step explanation: 4.3 is a compatible number if you divide it by both 4.3
D. 121
Same shape just has opposite degrees
