Answer:
Step-by-step explanation:
y=-3x²-4x+7...(*)
3x+2y=18...(**)
use (*) put the value of y in (**) :
3x +2(-3x²-4x+7)=18
3x-6x²-8x +14 -18 = 0
-6x²-5x- 4 = 0
6x²+5x+4 = 0
delta = b² - 4ac a = 6 b=5 c =4
delta = 5² - 4(6)(4)= 25 -96= -71 negatif
so no reals solution
Answer: probally the first one
Step-by-step explanation:
Answer:
4.4.
Step-by-step explanation:
3+7i/5i = 4.4
.
well...
15 x 20 = 300
300+85 = 385
you can get 20 watches for $385
Total hours= 2.2+3.5=5.7
Total earned = 5.7 x $7.50= $42.75
