Factor completely: 16x2 − 81 a. (4x + 9) (4x − 9) b. 16x2 − 81 c. (4x + 9) (4x + 9) d. (4x2 + 9) (4x2 − 9)

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

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

What is the value of x in the equation7x+2y=48 when y=3