
Differentiate:

Plug in everything you know:

,

, and

Answer:
3
Step-by-step explanation:
1/x=x+3/2x²
By cross-multiplication, we get,
2x²=x(x+3)
2x²=x²+3x
2x²-x²-3x=0
x²-3x=0
x(x-3)=0
x=3
We can check by using the
pythagorean theorem or a² + b² = c².
Substitute your values in for <em>a</em>, <em>b</em>, and <em>c</em>.
(9)² + (13)² = (16)²
~simplify
81 + 169 ≠ 256
81 + 169 is 250 but 16² is 256.
So, this in not a right triangle.
Answer:
540
Step-by-step explanation:
0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99
Answer:
Step-by-step explanation:
list of prime numbers from 1-21
2,3,5,7,11,13,17,19
he has 21 students
the only numbers he can divide by is 3 and 7
21/3=7
21/7=3