Answer:
(-9+√17)/8
Step-by-step explanation:
its an example of quadratic
Let the original cost of laptop=x
Savings=20% = 20/100
Saved amount = $140
Original cost = saved amount * 1/savings
x = 140* 100/20
x = $7000
SA= 2LW + 2LH + 2WH
Substituting for the values, SA = 900 cm^2
The answer is obviously {2}since there are NO EVEN PRIME NUMBERS, except for 2. So,there is only 1 element.
