Iwill upvote!
find a solution to the following system of equations.
−2x + y = −3
−x + 2y = 3
a- (–3, –9)
b- (3, 3)
c- (–21, –9)
d- (0, 2)

Which best explains why this triangle is or is not a right triangle?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?