There is one large bucket of balls. The ratio of balls in the bucket is 8 red balls, to 2 purple balls, to 1 blue ball, and you are picking 5 balls at random. What are the odds that you pick all blue balls?

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

the monthly balance will be $75,000

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.