Which expression is equivalent to 1/3(5x+3y)+2/5y+7?

a) 5/3x+7/5y+7
b)15x+9 2/5y+9
c)5/3x+2/5y+7
d)15x+2/5y+7

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

About 9% of th population is hopelessly romantic. if 2 people are randomly selected from the population, what is the probability that at least 1 person is hopelessly romantic?