Find the vertex of the parabola by completing the square.

x²+4x-5=y

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles