Question

Which system is equivalent to
y= 9x^2
x+y=5
?

Answer 1

Option 1st is correct

`5-x= 9x^2`

`y = 5-x`

Step-by-step explanation:

Given the equations:

`y = 9x^2` .....[1]

`x+y = 5` .....[2]

We can write equation [2] as:

`y = 5-x`

Now, substitute this y value in [1] we have;

`5-x= 9x^2`

Therefore, the system which is equivalent to the given system equation is,

`5-x= 9x^2`

`y = 5-x`

Answer 2

Answer : Option A

Step-by-step explanation:

we can clearly see that from x+ y=5 we can substitute y = 5-x in y = 9x^2

Option B is clearly incorrect x can not be y -5

Option C is incorrect because y can not be 5 +x

Option D is incorrect because its y = 9x^2 not y^2 =9x^2 so y can not be 3x

if its y^2 = 9x^2 then only implies y = 3x