Formula
Area = L*w
Hint : To find the area of a rectangle , multiply the length times the width
I hope that's help !
Answer:
1 tens 3 ones
Step-by-step explanation:
All you do is count the numbers in the place value chart.
Since 31-18=13, all you do is count 10+1+1+1=13.

Hope you could get an idea from here.
Doubt clarification - use comment section.
Answer:
w=7
Step-by-step explanation:
3w+4w=49
7w=49
w=49/7
w=7
Answer:
No, it is 45
Step-by-step explanation:
5*9=45