Answer:
EXPLAIN
Step-by-step explanation:EXPLAIN
EXAMPLE
If 1/5 of the cards are hockey cards, there are 2 hockey cards. if he wants to double that amount, he would multiply it by 2, so 2•2=4. The fraction of hockey cards is now is 2/5.
1/2 b-39=101
+39 +39
1/2 b= 140
2(1/2) b= 140(2)
b=280
9×2=18. add the tow zeros like this 9×2=18+00=1,800