Answer:
3600
Step-by-step explanation:
2628/73 = 36
36*100 = 3600
For this case we have that by definition, the discriminant of a quadratic equation 
, is given by:
: Two different real roots
: Two equal real roots
: Two different complex roots
If we have 
, then:
Substituting the values:
Thus, we have two equal real roots.
ANswer:
We have two equal real roots.
Basically, all you want to do is this:
do 5 divided by 6 (calculator preferred so you don't do a ton of division)
you get: 0.833333333
You then do 0.833333333 * 12
Your Answer:
10
<u>650 cannonballs
</u>
Explanation step by step:
upper layer = 1 ^ 2
second layer = 2 ^ 2
third layer = 3 ^ 2
layer 12 is 12 ^ 2
<u>The formula is:
</u>
<u>n * (n + 1) * (2n + 1) / 6
</u>
<u>n = 12
</u>
<u>12 (12 + 1) (2 * 12 + 1) / 6
</u>
<u>12 * 13 * 25/6 =
</u>
<u>650
</u>
<u>
</u>
There are 650 cannonballs in this pyramid.
So
100%=original
25% discount
100-25=75
it is 180 sale
75%=180
find 100%
a hack is to recognize that 75/3 times 4=100 so
75%=180
divide 3
25%=60
times 4
100%=240
the real way is proportions
75:180 =100:x
75/180=100/x
multiply both sides by 180x
75x=18000
divide 75
x=240
origitnal price=$240
