Answer:
x = -1
Step-by-step explanation:
3^x = 1/3
3^x= 3^-1
x=-1
Answer:
D) (4,5)
Step-by-step explanation:
the ordered pair (4, 5) is the only one that, when substituted into each inequality statement, made both of them true
To find the number of CD on sale, we can set an equation.
Let y be the number if CD.
As she bought 40%, the amount she bought= 40%y
The equation:
40%y = 80
0.4y = 80
y = 80÷0.4
y=320
Therefore there were originally 320 CDs.
Hope it helps!