Factoriza completamente las siguientes expresiones; 1. 3a²-a 2. 7ab³-14b 3. x³-x²+x 4. 12x³-xy² 5. 5x-6x²+7x³ 6. 7a+8ab+9a² 7.3x²-3xy+6xy²

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.