The numerator and denominator of a fraction are in the ratio of 2 to 5. If the numerator and denominator are both decreased by 2, the fraction is now equal to 1/2. If n = the numerator and d = the denominator, which of the following systems of equations could be used to solve the problem? 5n = 2d and n - 2 = 2d - 4
5n = 2d and 2n - 4 = d - 2
2n = 5d and 2n - 4 = d - 2
2n = 5d and n - 2 = 2d - 4

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.

Can someone check if i did this correct. it’s number 4 if you’re wondering.

The quadratic function h(t)=-16.1t^2+150 choose the graph representation