Errol works as a delivery driver for Uber Eats, he uses the expression 50 + 7.50e to keep track of his wages. His sister Cheryl works for DoorDash, she uses the expression 25 + 8.75d. They want to buy their mother a present for her birthday, and plan on putting their money from this week together. Determine the expression that represents their total earnings.

Can you simplify 4/7? 24 points will be awarded!

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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.