1/(1 x 2) + 1/(2 x 3)+1/(3 x 4)++1/(2019 x 2020)= ?

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

The liabilities of cullumber are $99,000. owner’s capital is $143,000; drawings are $96,000; revenues, $467,000; and expenses, $301,000. what is the amount of cullumber company’s total assists?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.