Choose the correct graph of the given system of equations. y + 2x = −13y − x = 4

a.)graph of two lines that intersect at the point negative 1, 1, with text on graph that reads one solution negative 1, 1
b.) graph of two lines that intersect at the point 1, 1, with text on graph that reads one solution 1, 1
c.) graph of two parallel lines with positive slopes with text on the graph that reads no solution
d.) graph of two lines on top of each other with text on graph that reads infinitely many solutions

Suppose there are 10 five and six-year-old attending a birthday party. when a 30 year old mother walks into the room with an infant in her arms, what happens to the mean age in the room? what happens to the standard deviation of ages in the room? a. the mean and standard deviation of both change. b. the meaning will change, but the standard deviation will stay approximately the same. c. i mean will stay approximately the same, but the standard deviation will change. d. the mean and standard deviation will both stay approximately the same.

Could somebody me with this radical simplification?

What is the location of point g, which partitions the directed line segment from d to f into a 5: 4 ratio? –1 0 2 3