0.7x-y=4.22 5-0.8x= 0.2y
1 answer:
The solution of the set of equation is
x=6.217
y=0.132
<u>Step-by-step explanation:</u>
given the set of equations
0.7x-y=4.22(1)
5-0.8x=0.2y
-0.8x-0.2y=-5 (2)
multiply (1) and(2) by 10
7x-10y=42.2(3)
-8x-2y=-50(4)
solve (3) and (4) using elimination method
⇒-40x-10y=-250(5)
(5)-(3)
-47x=-292.2
x=6.217
substituting value of x in 3
we get y=0.132
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Answer:
The line passes through the points ( 0 , 4 ) and ( 12 , 0 )
Step-by-step explanation:
Given equation of line as :
y = - x + 4
Let the points through which the line passes are
( ,
) , (
,
)
Now, for x = 0 , The line equation is y = - × 0 + 4
I.e for x = 0 , y = 0 + 4 = 4
So, ( ,
) = ( 0 , 4 )
Again , for y = 0 , The line equation is 0 = - × x + 4
I.e for y = 0 , The line equation is 4 =
Or, for y = 0 , x = 4 × 3 = 12
So , ( ,
) = ( 12 , 0 )
Hence The line passes through the points ( 0 , 4 ) and ( 12 , 0 ) Answer