Identify which lines are parallel y=(1/2)×+4

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

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

Determine the area of a triangle with (see picture below)