It was -3 Celsius sunset. At sunset next morning, it was -7 Celsius. Which exspression gives the temperature change from sunset to sunrise? A. -3 - (-7) or B. -7 - (-3)
No links or fake answers. I'm so bad at deciding which number goes where -_-

The deck that kenneth is building is in the shape of a parallelogram abcd the measure of angle c is one third the measure of angle b find the measure of each angle of the deck

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.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?