She had both on May 5
swimming lessons every 5th day
5,10,15,20
diving lessons every 3rd day...
3,6,9,12,15
so they both have a common multiple of 15
so fifteen days after May 5 = May 20 <==
We have the sum of cubes identity

and observing that 1 + 4 = 2 + 3, we have

and

Then

Alternatively, we have the well-known sum of cubes formula

The sum under the square root is this sum with
. Then

and so the square root again reduces to 15.
Answer:
10
Step-by-step explanation:
Put this into an equation. Solve for x. X is that certain number.
2( x + 7) = 34
Answer:
15.8 dollars per dvd.
Step-by-step explanation:
<em>Our equation for this problem is:</em>
<em />
<em>v = how much one dvd costs</em>
<em />
<em>2v + 3.15 - 1 = 33.75</em>
<em>2v +3.15 =34.75 (added 1 on both sides)</em>
<em>2v = 31.6 (subtracted 3.15 from both sides)</em>
<em>v = 15.6 (divided by 2 on both sides) </em>
<em />
Sqrt(220)= sqrt(2•2•5•11)=2 sqrt (5•11)=
2 sqrt(55)
So no the radical was not in it’s simplest form