Ich kann nicht ohne deutsch sprechen, bitte helfen sie!

1/2 = ?

bitte helfen sie!

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Find the vertex of the function given below y=x^2-6x+1

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?