How many 3-digit numbers can you write if you cannot use any other digits except 4 and 6?

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

You and a friend went to the movies. you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

If the value of cos330°is√3/2 then find cos 165°.