Quadrilateral abcd  is a parallelogram. ac=bd  ,ac    bisects bd  , and  .  what is the best  name for quadrilateral abcd? a. rectangle c. isosceles trapezoid b. rhombus d. square      

Use the graph of the sine function y=2sinθ shown below

Ineed with number 6 , explain how to get 1978

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)