Given that 7a+14b−28c=−77, −3a−b+37c=63, and 2a+0b−26c=−42, solve the system of equations using gaussian elimination. state the solution as an ordered triple (a, b,c).

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.