Multiply the additive inverse of -1/14 with the multiplicative inverse of 21/49. Chapter : Rational Numbers​

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?

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.