Which equation has a graph that is a parabola with a vertex at (–1, –1)?
a. y = (x – 1)2 + 1
b. y = (x – 1)2 – 1
c. y = (x + 1)2 + 1
d. y = (x + 1)2 – 1

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

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

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.