I don't quite understand the ten strategy, or what EXACTLY you're asking. But, what you can do is when you add a one digit number plus a nine, just change the nine to a ten and subtract one. It is very easy. So, 7+10 equals 17, subtract one and you get 16 which is 7+9. It is always one less than anything plus 10.
Answer:what is this
Step-by-step explanation:
Answer:
C is the answer
Step-by-step explanation:
pls add me on brainlist
Answer:
2x*x
2x*-5
1*x
1*-5
2x²-10x+x-10 add numbers that have similar variables
-2x²-10x+x-10
=[-2x²-9x-10]
Answer:
12
Step-by-step explanation:
The sum of the measures of the interior angles is given by:
n:sides of the polygon
And in a convex polygon the sum of the exterior angles sums 360°
Then
You just solve it and the answer is 12.
