Graph y=-1/2x^2-1. identify the vertex of the graph. tell whether it is a minimum or maximum. (to clarify, 1/2 is a fraction *x^2)

1. (-1,0); minimum
,0); maximum
3.(0,1); maximum
4.(0,-1); minimum

two data sets with the same median will not have the same varaibility

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.