If the pattern below follows the rule "starting with two, every consecutive line has a number that is one less than twice the previous line," how many marbles must be in the sixth line? image is above

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a