Answer:
last option is correct
Step-by-step explanation:

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!
Answer:
(3x3−6x2+7x−11)+(10x2−9x+4) = 10-2x
5x−15 = 5(x-3)
13x3−15x+7x−7 = 32-8x
3x3+4x2−2x−7 = 10-2x
3x3+4x4−2x2−7 = 14
(12x2−7x+8)−(4x2−5x+10) = 14-2x
16x2−12x+18 = 50-12x
Step-by-step explanation:
I'm in need of Science help myself if you can help that would be wonderful!
Answer:
Solution given
tan θ=opposite/adjacent=y/x is a required answer.
Answer:
Well if no variable substitution is given its 10+q
10+q=10+q