In a class of 30 students there are 18 girls. what is the ratio of boys to girls in the class.
oh and how would i write the equasion to solve the problem

Plz, ! the box plot below shows the total amount of time, in minutes, the students of a class surf the internet every day: a box plot is shown.part a: list two pieces of information that are provided by the graph and one piece of information that is not provided by the graph. (4 points) part b: calculate the interquartile range of the data, and explain in a sentence or two what it represents. (4 points) part c: explain what affect, if any, there will be if an outlier is present. (2 points)

When turned about its axis of rotation, which shape could have created this three-dimensional object?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?