Answer : Option A
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
P-6 because you subtract the variable from the 6
Answer:
The answer is c i believe
Step-by-step explanation:
Answer:
4 hours
Step-by-step explanation:
72+12x=120 and when you isolate x you get x=4
