Jill = J
Amanda = A
J + 6 = 2 (A+6) ..... ......................... J + 6 = 2A + 12
J -1 = 9 (A-1) ............................... J - 1 = 9A -9___ (- )
We need to elimiate both of <span>those formula</span> , the result will be
7 = -7A + 21
7A= 14
A = 2 >>>>> subtitute this to any formula above
So, Jill's age now would be:
J + 6 = 2 (A+6)
J + 6 = 2 (2+6)
J + 6 = 16
J = 10
ᅟᅟᅟᅟᅟᅟᅟᅟᅟᅟᅟᅟ
<span>ᅟᅟᅟᅟᅟᅟᅟᅟᅟᅟᅟᅟ</span>
The first sentence is referring to a secondary reinforce while
the second sentence is referring to primary reinforce. A primary reinforce are
usually base on biological things such as the water we drink or food that we
eat while the secondary reinforce is base on the conditions that humans is
reinforcing such as money or grades.
Answer:
D
Explanation:
The rest are all major contrasts between market-based and command-based economies. However both economies exchange currency in trade.