A teacher took a poll of a class to find out if the students Preferred cats or dogs .the ratio of students who prefer cats vs. students who prefer 2:5 if there are 49 students in the class how many more prefer dogs than cats ?? ...( I need help now .

Malia is observing the velocity of a cyclist at different times. after two hours, the velocity of the cyclist is 15 km/h. after five hours, the velocity of the cyclist is 12 km/h. part a: write an equation in two variables in the standard form that can be used to describe the velocity of the cyclist at different times. show your work and define the variables used. (5 points) part b: how can you graph the equations obtained in part a for the first 12 hours? (5 points) if you can try and make this as little confusing as you can

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Simplify this expression. 8x 16(x + y)