Help! Will mark brainiest sorry its pretty blurry

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

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?