Ineed on these plssquestion 1  the work of a student to solve the equation 2(5y − 2) = 12 + 6y is shown below: step 1: 2(5y − 2) = 12 + 6y step 2: 7y − 4 = 12 + 6y step 3: y − 4 = 10 step 4: y = 14 step 5: y = 7 in which step did the student first make an error and what is the correct step? question 2a student is trying to solve the system of two equations given below: equation p: y + z = 6equation q: 8y + 7z = 1which of these is a possible step used in eliminating the y-term?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

1. an economy consists of three workers: larry, moe, and curly. each works 10 hours a day and can produce two services: mowing lawns and washing cars. in an hour, larry can either mow one lawn or wash one car; moe can either mow one lawn or wash two cars; and curly can either mow two lawns or wash one car. a. calculate how much of each service is produced under the following circumstances: a. all three spend all their time mowing lawns. b. all three spend all their time washing cars. c. all three spend half their time on each activity d. larry spends half of his time on each activity, while moe only washes cars and curly only mows lawns b. using your answers to part a, draw a production possibilities frontier and label points a, b, c, and d on your graph. explain why the production possibilities frontier has the shape it does. c. are any of the allocations calculated in part a inefficient? explain.

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9