Write an equation for each condition listed. the line with a slope of 7 and a y-intercept of -1 (in slope-intercept form)

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?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

If the discriminant if a quadratic equation is 4 which statement describes the roots?