I believe the meaning of life is to go for your dreams and live everyday to the fullest because you never know when it’s your time to pass away and you wanna know you did everything you wanted to in life:)
Answer:
When you kick your leg in front of you by using your knee and not the hip that movement is called extension. Every movement that makes a joint move in such a way that the body part moves away from your center is called extension. When we extend the knee joint our quadriceps muscle contract and pulls the shin upwards.
Let

the cost of a DVD
Let

the cost of a CD
We have

and

We can replace

with

in the second equation and get



This person would have to be in 1990 B.C., because when in B.C., as the years go by, the number of the year gets lower. So the person was 10 in 1995 B.C., and 15 in 1900 B.C.