20 POINTS ANSWER FAST If two fractions are proportional, then the cross products are equal.

true or false?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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.