abraham has 16 blue marbles and 18 rwd marbles. if he wamts to place them in identical groups without any marbles left over

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?