What type of figure must a quadrilateral be if its diagonals are perpendicular bisectors of each other and are congruent?

What are the soultion(s) to the quadratic equation 40- x^2=0

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.