1. X<0 or x>0
2. X<0 or x>0
3. X<0 or x>0
4. X<0 or x>0
5. X<2 or x>2
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9 to the second power 3 to the fourth power and 81 to the first power
A) 4*N -Q = 0
B) .05N + .25Q = 2.10
Multiply B) by 4
B) .2N + Q = 8.40 Adding this to A)
A) 4*N -Q = 0
4.2N = 8.40
N = 2 Nickels
Q = 8 Quarters
By using numbers and solving it how your teacher teached you lol XD