There are 6 boys to every 9 girls in the sixth grade. there are a total of 75 students in the sixth grade. there are how many boys in the sixth grade?

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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?