please help me to understand the work that I need to assist my daughter on

Solve using the elimination method. 0.5x - 0.2y = - 1.7 0.2x - 0.5y = - 1.1 (Hint: Since each coefficient has one decimal place, first multiply each equation by 10 to clear the decimals.) Select the correct choice below and fill in any answer boxes in your choice! O A. The solution is The system is consistent and independent. (Type an ordered pair.) O B. There are infinitely many solutions in the form (x, and dependent. . The system is consistent O C. There is no solution. The system is inconsistent and independent. About 250,000 people of a certain community live in the country. Of that number, 73,950 live in state A and state B. The number of people of that community in state B is 12,510 more than three times the number in state A. How many people of that community live in each state? The number of people of that community that live in state A is and in state B is Two planes travel toward each other from cities that are about 3720 km apart at rates of 480 km/hr and 450 km/hr. They started at the same time. In how many hours will they meet? The two planes will meet after hours. (Simplify your answer.)