10 x 25 = 250, well 20 x 25 is just double that, its 10 doubled x 25 so he probably just added it up. repeated addition really helps with times tables.
The height of an oak tree (which depends on the age of the tree) is 100
Answer:
-6x+-5y= -3/2
Step-by-step explanation:
Hope this helps
Hi
perimeter of rectangle is : 2 length+2 width .
to progress in math, you must practice.
So , I let you do the first one which is the esaiest.
48 ) V147+ V147 + V108+V108 = 2V147 +2V108 = 2 ( V147+V108)
Y= 4.5 because the length is less than 6=x.
