A stamp collector has some 15¢ stamps and some 20¢ stamps. The number of 15¢ stamps is eight less than three times the number of 20¢ stamps. The total value is $4.

Find the number of each type of stamp in the collection.

Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Find the area of the unshaded square