5x+10y=15 solve for x

What is the value of y? round to the nearest tenth

A(t)=728(1+0.04)^t how much money did aditya originally invest

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is