Answer:
Step-by-step explanation:
15 minutes of an hour is 15/60. So 15/60 can be simplified to 1/4.
Answer:
x = ± 
Step-by-step explanation:
Given
3x² - 9 = 0 ( add 9 to both sides )
3x² = 9 ( divide both sides by 3 )
x² = 3 ( take the square root of both sides )
x = ± 
The third one should be -2(2x-6)=12-4x
Last one should be 2(2x-6)+4x=8x-12
Answer: no solution
Step-by-step explanation: the answer will be negative