Solve the word problem below by creating and solving a system of equations by elimination. Shayla tutors middle school students and high school students. She charges a different rate for each. Last
week, she tutored middle school students for 5 hours and high school students for 12 hours. This week,
she tutored middle school students for 6 hours and high school students for 10 hours. She earned
$400 last week and $370 this week. How much does she charge each.

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

I'm marking the brainliest and it's 15 points

Plz : denver is about 5,200 feet above sea level. which number line best represents this integer?