Answer: 3(9x^2-14x+4)
Step-by-step explanation: Factor 3 out of the equation 27x^2-42x+12
What you use is y=-3x+-4. I hope that helps.
When you want to increase percentage, you divide the percentage by 100 and add it to 1. When you want to decrease, you divide the percentage by 100 and take it away from 1.
Therefore, I think:
a) 429 X 1.31 = 561.99
b) 345 X 0.88 = 303.6