In a grade seven class, 18 students have pets, and 12 do not. What percent of the class has a pet? I will mark brainliest to the first correct answer

urgent pls

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.

3. simplify. 312⋅312 4. rewrite n√xm using a rational expression.