Una acera requiere de 40 y d² de concreto ¿Cuántos m³ se necesitan ?​

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?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

Solve the equation. 2x - 8(x+1)= 6(2x - 3)