Step-by-step explanation:
1. a² - ( b ² - 2bc + c² ) = a ² - b ² + 2bc - c²
2. 8p² - 18 q²
3. 3ab² - c²d + 3ab - b²c²
4. x² - 2x + 1
Answer:
the answer is a rational number
all you have to do is see whether both variables of each point meet both contraints:
for a) 1<3 and 2>1 is true so a is a solution to the system
Hello there!
28 recipes .......> 100%
15 recipes .......> x%
Cross multiply
28x = 15*100
28x = 1500
x= 1500/28
x ≈ 53.5%
She makes 53.5% of the recipes.
I hope that helps!