Answer:
5
Step-by-step explanation:
4*10x=40x
4*2=8
40x-8=192
40x=192+8
=200
X= 200/40
=5
X - 3y=0
3y - 6 =2x
__________
x - 3y=0 ........(1)
-2x + 3y=6 ........(2)
__________
-x = 6 ==》x = -6 .........(3) subst. in (2)
-2 (-6) + 3y = 6 ==》3y= -6 ==》y = -2
Answer:
$250
Step-by-step explanation:
The dryer costs x dollars
The washer costs 3x dollars
3x + x = 1000
4x = 1000
x = 250
The dryer is $250
Remember that (a-b)(a+b)=a²-b²
and (imaginary number)²=real
so if we have a+bi, then a-bi is the conguate because (a+bi)(a-bi)=a²+b²
if the complex number is a+bi the conjucate is a-bi