The ratio of Luis´s salary and Andres´s salary is 5 to 3. In July by mistake, Andres received $720 more, which received the same amount from Luis. How much is Luis´s salary?

Can you draw an isosceles triangle with only one 80 degree angle?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.