Answer:
D
Step-by-step explanation:
You need to explain why you feel they are good or bad.
180=11+2x
-11 -11
169/2=2x\2
x=84.5
<span>A direct variation means proportionality. Triangular numbers are quadratic in n. T(n)=n(n+1)/2. So no.</span>
area = x^2 -10x+25
side = sq root area
x^2-10x+25 = (x-5)(x-5) = (x-5)^2
=》 side = (x-5)
Answer:
6x=100+80
6x=180
x=180÷6
x=30
so we have to work for 30 hours to can buy the CD player and still have $ 80.
