To answer this item, we let x be Jeff's speed when going back home. With this representation, the speed from home to his parents is x + 9. The total time it took him for the trip is 8 hours. The time of each trip can be calculated by dividing the distance by time. Such concept is presented below.
8 hours = 160/x + 160/(x + 9)
The value of x from the equation is 36. Thus, his speeds were 36 miles/h and 45 miles/h.
The gross debt is the total amount of debt the gov. has issued . the difference is that the net debt does not include debt owned by the gov. to itself
The largest amount of money the government lays out is for the transfer program, Social Security. And its largest expenditure is for national defense. America is quite known for spending a lot of money on defending itself from any possible threat.
I think the correct answer would be crowdsourcing. It is a practice that involves obtaining certain information from the market or the public. It allows the consumers to suggest and comment on the products a company has. Hope this answers the question.
