Hello,
y-3x=2==>x=(y-2)/3
==>(x+1)²=((y-2)/3+1)²=(y+1)²/9
y=(x+1)²-5
==>y=(y²+2y1)/9 -5
==>y²-7y-44=0 ; Δ=7²+4*44=225=15²
==>y=(7+15)/2 or y=(7-15)/2
==>y =11 and x=(11-2)/3=3
or y=-4 and x=(-4-2)/3=-2
sol={(3,11);(-2,-4)}
Answer:
420 seconds
Step-by-step explanation:
60 seconds are in 1 minute
60 x 7 = 420
therefore there are 420 seconds in 7 minutes
Answer:
640x²-380x
Step-by-step explanation:
(4x]+4[(10x-6)(4x)]4x+(40x-24)(16x)
4x+640x²-384x
640x²-384x+4x
640x²-380x
