Lin says, "When you add or multiply two complex numbers, you will always get an answer you can write in a + bi form."
Noah says, “I don't think so. Here are some exceptions I found:"
(7 + 2i) + (3 - 2i) = 10
(2 + 21) (2 + 2i) = 8i
a.
Check Noah's arithmetic. Is it correct?
b.
Can Noah's answers be written in the form a + bi, where a and b are real numbers? Explain
or show your reasoning.

Can someone pls ! pls answer all. no explanation needed..

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer