Kalon and his friend marna own a chimney sweep service company. working together, they can clean a chimney in 1 5/7 hours. if it takes kalon 4 hours to clean a 20-foot chimney by himself, how long does it take marna to clean the same size chimney by herself?

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

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

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i