Answer:
cost = $10
Step-by-step explanation:
let cost be x
Price = x+ (0.5x)= 1.50x
cost reduced in term of x is 20% of 1.50x
* 1.50x = 0.3x
hence 1.50x - 0.3x = 12
1.2x=12
x= = 10
cost = $10
Chen check the temperature at Dawn and at dusk every day for a week for a science project. How many observations does he make?
2 answers:
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