Answer:
D
Step-by-step explanation:
-2 --> 2 = +4
5 --> - 3 = -8
<4, -8>
1.28
Assuming in 8a2 the '2' represents an exponent, you answer should be
200 copies must be sold
n= number od newsletters
0,50*n+300=2,00*n
300=1,5*n
Divide both sides by 1,5
200=n
0,50*200+300=2*200
100+300=400
400=400
5x² - 9x + 45 = 0
Δ = b² - 4.a.c
Δ = (-9)² - 4 . 5 . 45
Δ = 81 - 4. 5 . 45
Δ = -819
There's no real root.