1/2 because you can simplify 4/8 and do 4 divided by 4 and 8 divided by 4 which is 1/2
Answer:
X = 9 or x = -9
Step-by-step explanation:
We want to solve the quadratic equation
We shall use the square root method
Let us add 4 to both sides to get:
We take square to get:
The solution is x=9 or -9
Answer:
The reporter surveyed 60 girls.
Step-by-step explanation:
From the information given, you can use a rule of three to find the amount of girls that the reporter surveyed which is 100% given that 39 girls represent 65%:
65% → 39
100% → x
x=(100*39)/65
x=60
According to this, the answer is that the reporter surveyed 60 girls.
Answer:
no real solution is the answer
If you have to list your extraneous solutions somewhere, that would be x=0.
Step-by-step explanation:
Cool thing here is the radical, the thing with the square root, is already isolate.
So we need to square both sides as a first step. (Whenever you raise both sides to even power, you must definitely check your solutions as some might not actually be solutions to the original equation)
So upon squaring both sides I get:
x^4+16=(x^2-4)^2
Now I will write (x^2-4)^2 as (x^2-4)(x^2-4) and foil it! This gives me:
x^4+16=x^4-8x^2+16
Subtract x^4 and 16 on both sides:
0=-8x^2
Divide both sides by -8
0=x^2
Therefore x=0.
0 isn't actually a solution though because when you plug it in you get 4=-4 which is not true.
