What is the missing side the perimeter is 28m?

Which statement about the graph of y = 8(0.25)^2

What is the first step of an indirect proof of a number that is divisible by two

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