ndex Notation and Powers of 10
10 to the Power 2
The exponent (or index or power) of a number says
how many times to use the number in a multiplication.
102 means 10 × 10 = 100
(It says 10 is used 2 times in the multiplication)
Example: 103 = 10 × 10 × 10 = 1,000
In words: 103 could be called "10 to the third power", "10 to the power 3" or simply "10 cubed"
Example: 104 = 10 × 10 × 10 × 10 = 10,000
In words: 104 could be called "10 to the fourth power", "10 to the power 4" or "10 to the 4"
The answer should be 21 hope it helps
11*5*7
385 breaks down to 7 and 55. Bring the seven down. Break 55 down to 11 and 5. Then bring those down and you get 11*5*7
2 Times + 2 =4 table of a pair
Answer:
![\Huge \boxed{x=-1}](https://tex.z-dn.net/?f=%5CHuge%20%5Cboxed%7Bx%3D-1%7D)
Step-by-step explanation:
![x^2+2x=-1](https://tex.z-dn.net/?f=x%5E2%2B2x%3D-1)
Adding 1 to both sides of the equation.
![x^2+2x+1=-1+1](https://tex.z-dn.net/?f=x%5E2%2B2x%2B1%3D-1%2B1)
![x^2 +2x+1=0](https://tex.z-dn.net/?f=x%5E2%20%2B2x%2B1%3D0)
Factoring the left side of the equation.
![x^2 +1x+1x+1=0](https://tex.z-dn.net/?f=x%5E2%20%2B1x%2B1x%2B1%3D0)
![x(x+1)+1(x+1)=0](https://tex.z-dn.net/?f=x%28x%2B1%29%2B1%28x%2B1%29%3D0)
![(x+1)(x+1) = 0](https://tex.z-dn.net/?f=%28x%2B1%29%28x%2B1%29%20%3D%200)
![(x+1)^2 =0](https://tex.z-dn.net/?f=%28x%2B1%29%5E2%20%3D0)
Taking the square root of both sides of the equation.
![\sqrt{(x+1)^2} =\sqrt{0}](https://tex.z-dn.net/?f=%5Csqrt%7B%28x%2B1%29%5E2%7D%20%3D%5Csqrt%7B0%7D)
![x+1=0](https://tex.z-dn.net/?f=x%2B1%3D0)
Subtracting 1 from both sides of the equation.
![x+1-1=0-1](https://tex.z-dn.net/?f=x%2B1-1%3D0-1)
![x=-1](https://tex.z-dn.net/?f=x%3D-1)