(3t + 7)−2(6.3t + 4) *

15.6t − 1
15.6t + 15
−9.6t + 15
−9.6t - 1

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

If 25% of y is 30, what is 60% of y?

Solve the equation by completing the square. x^2+2x=17