4x + 2h PM me if you have any further questions
Answer:
2:5
Step-by-step explanation:
Since 40% is basically 40:100, You can scale it down by a factor of 20, giving you 2:5.
4 is a composite number.
4 is divisible by 2, so it's not prime
1. y = x^2 +3
x = y^2 +3
x - 3 = y^2
y = + or - √(x-3) not a fction
2. y = 0x -9
x = 0y -9
x = -9 not a fction
3. y = -7x
x = - 7 y
y = - x/7 yes function
4. y = |x|
x = |y|
y= x,-x not a function