Answer:
Step-by-step explanation:
c.d.=21-18=18-15=3
y=15+3(x-1),x∈N,x≤18
recursive equation
a_{n}=a_{n-1}+3
2.
S_{18}=18/2{2×15+(18-1)×3}=9(30+51)=9×81=729
Total sales=729×27=19,683 $
hi
if reduce equation of line is y = 3x
and if x = -2 so y = 3*-2 = -6
Option D is the correct answer.
When making a scale model, you need to ensure that both values are in proportion, or work with the same constant.
In the case of Option D, the scale model is '2 feet : 1 inch'. Since multiplying 11 by 2 is 22 and 12.5 by 2 is 25, you know for sure that these numbers are in proportion
-T.B.