An investor has $1100 income from bonds bearing 4% and 5%. if the amounts at 4% and 5% were interchanged, she would earn $50 more per year. find the total sum invested.

Leo is going to use a random number generator 4 0 0 400 times. each time he uses it, he will get a 1 , 2 , 3 , 4 , 1,2,3,4, or 5 5. what is the best prediction for the number of times that leo will get an odd number?

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

How is this equation completed? i cannot find any examples in the book.