Which expression can be substituted for x in the top equation of the following system to solve the system by substitution? 2x−7y=15 x+4y=6

Use the diagonals to determine whether a parallelogram with vertices u(2,−2), v(9,−2), w(9,−6), and x(2,−6) is a rectangle, rhombus, or square. give all the names that apply.

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Ok a point t on a segment with endpoints d(1, 4) and f(7, 1) partitions the segment in a 2: 1 ratio. find t. you must show all work to receive credit.