Answer:
Its the last one
Step-by-step explanation:
Answer:
i) y=-2x-7 and (ii) 2y-x=1
substitute i into ii
and solve for X
2(-2x-7)-x=1
-4x-14-x=1
-5x-14=1.........adding similar terms
-5x=15
X=-3......by dividing both side by -5
Then to solve for Y substitute X=-3 into one equation.
take eqn i) Y=-2(-3)-7
Y=6-7
Y=-1
in order pair form (X,Y)=(-3,-1)
Answer:
y=(x^2 -2x-3)/3
Step-by-step explanation:
f(x)= √3x+4 -1
x=√3y+4 -1
(x+1)^2=(√3y+4)^2
3y+4=x^2 +2x+1
3y=x^2 +2x-3
y=(x^2 +2x-3)/3
Answer:
y=11
x=8
Step-by-step explanation:
This is Elimination
2x+2y=38
Subtract 2x on both sides 2y=-2x+38
Then Multiply 2(y=x+3) which equals 2y=2x+6
Solve by Elimination
2y=-2x+38
2y=2x+6
add the y's and since the x's are different those cancel out, then add 38 and 6.
then you do the equation 4y=44
divide both by 4
y=11
then you do 11=x+3
subtract 3 on both sides
x=8
and there you go
I hope this is how you wanted it solved