X = bookshelf //// y = books
x + y = 416
416-80 = y4
336 = y4
336/4 = y
84 = y
Mr. Harrison can buy 84 books
If the area for a circle is
, you can write it in terms of its diameter like this:
<span>Divide 26 by 0.4 and get 65.</span>
Gauss's approach is to add the same sequence in reverse order, namely
S=1+3+5+7+......+95+97+99
S=99+97+95+......+7+5+3+1
---------------------------------------
2S=(1+99)+(3+97)+(5+95)+......(95+5)+(97+3)+(99+1)=50*100=5000
=> sum = (2S)/2 = 5000/2=2500.
Answer:
26/3
Step-by-step explanation:
1/2 * 3 = 3/6
5 3/6 + 3 1/6 = 8 4/6
6 * 8 = 48
48 +4=52
52/6 divided by 2 = 26/3
