Jade and Chet get a weekly allowance plus x dollars for each time the pair walks the dog. They plan to save 40% of
their combined earnings in one week to purchase a new
app for their smart tablet. Their earnings in a certain week
are represented in the table. If their parents pay $2.50
each time they walk the dog, how much money will they
have to purchase the app?
Earnings ($)
Jade
8 + 2x
Chet
4X + 6

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?