kylie had $5 to spend on pencils. she brought 12 pencils and had $2.12 left . how much was each pencil ?

What is the value of x in the following equation? -3x-2=2x+8

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

If there is 20 dogs in the shelter and 5 dogs get homes, and then 43 more dogs come. how many dogs are there in the shelter?