Một mảnh đất hình chứ nhật có chiều dài 18m và chiều rộng 15m. Người ta dành 20% diện tích mảnh đất để làm nhà. Tính diện tích phần đất làm nhà.

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)