The pictures Melcher take out the family room were 77 pictures.
Melchers digital camera can hold about 430 pictures, He used 18% of the mirror memory card while taking pictures at family reunion.
Now, to get number of pictures Melcher take out the family room:
Number of pictures Melcher take = 18% of total number of pictures camera can hold.
So, number of pictures Melcher take = 77.4
Now, rounding to the nearest whole number = 77.
Therefore, the pictures Melcher take out the family room were 77 pictures.
A quadratic (equation or expression) involves the second and no higher power of an unknown quantity or variable.
The quadratic formula is derived from the General form of a quadratic equation :
using completing the square method.