jennifer spent half of her weekly allowance at the movies. her parents gave her $7. what is her weekly allowance if she now has $14? write an algebraic equation to solvepls i don't get it

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.

Which table shows a proportional relationship between miles traveled and gas used?

The curved part of the figure is the semicircle what is the best approximation for the area of this figure