A: -0.5 is the coefficient.
b: x+y=110. -1 represents vise versa.
c: causation
1080-360 = 720
720-360=360
360-360=0
so tan 1080 = tan 0 = 0
1 sq yrd = 9 sq. ft
so 30 sq. yards times 9 = 270 square feet
-"270 square feet"-
Answer:

Step-by-step explanation:
we know that
using proportion

Answer:
A. $18.54
Step-by-step explanation:
laptop cost x commission = money made
309 x 0.06 = 18.54