There are three schedule options for classes at a high school: 90-minute classes every other day for a year, 90-minute classes every day for a semester, or 45-minute classes every day for a year. out of 1200 students, 50 students from each grade level are chosen at random and asked their preference. identify the population and the sample. a. population: the entire student body sample: 200 students from each grade level c. population: 1200 students sample: 50 students b. population: the entire student body sample: 50 students from each grade level d. population: 1200 students sample: 1200 students

Option B is correct.

Step-by-step explanation:

Population refers to the whole part out of which samples are taken.

Given is : Out of 1200 students, 50 students from each grade level are chosen at random and asked their preference.

Here, the population is the overall student body. And there are 50 samples drawn from each grade.

So, the correct answer is :

b. population: the entire student body sample: 50 students from each grade level

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!