N(2n+6)-(n²-1)= 2n²+6n-n²+1=n²+6n+1
10 because the lesser number is 70 and the greater number is 80 80-70=10
5x4= 20
50x40=200
500x400=200000
Do you see the pattern? 5x4=20, which means that all you need to do is add the zeros. 50x40 has two zeros, which means it should equal 200.
Find the percent of change48 notebooks to 14 notebooks
Find amount of change:-
48 - 14 = 34
Find percent change:
34 ÷ 14 ≈ <span>2.4
</span><span>2.4 </span>× 10 = 24
24%
percent change is 24%