Ed made a scale drawing of a house and its lot. The scale he used was 1 inch : 2 feet. The actual width of the porch is 20 feet. How wide is the porch in the drawing?

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?

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Which expression is the factorization of x^2+10+21