Landon is building new bookshelves for his bookstore's new mystery section. each shelf can hold 34 book. there are 1,265 mystery books. how many shelves will he need to build

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 axis of symmetry of the function f(x)=-(x+ 9)(x-21)

3x + 4y = 5 x- 3y = -7 solve by substitution