What is 7a+21=56 and what is the solution

Amarathon runner jogging at a constant speed for 45 minutes is it proportional to time or not

Write each expression in exponential form and find its value.| ! 2 x 2 x 2 x 2

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