C= 1,800- dailey fixed cost
2,200 (x) pianos in one day
c= 1,800 +2,200 (2)=
cost= 6,200
Answer:
answer id the 4th degree angle
Step-by-step explanation:
L*W=51
L=W+4
Replace L with W+4: (W+4)*W=51
W²+4W-51=0
use the quadratic formula to find W:5.4 (sorry cannot type the formula here)
the length is 5.4+4=9.4
D=10
Explanations: 2d-5=3d- 15
2d- 3d =-15+5
D=10