Gloria has a lunch account in the school cafeteria. the balance, f(x), in her account can be represented by the function f(x) = –1.50x + 40, where x is the number of meals purchased. suppose –1.50 changed to –2.75. what does this mean in the context of the problem?

a. changing –1.50 to –2.75 means her initial balance has decreased.
b. changing –1.50 to –2.75 means her initial balance has increased.
c. changing –1.50 to –2.75 means the price per meal has decreased.
d. changing –1.50 to –2.75 means the price per meal has increased.

"Changing –1.50 to –2.75 means the price per meal has increased" is the one among the following choices that shows the meaning in the context of the problem. The correct option among all the options that are given in the question is the fourth option or option "D". I hope the answer has helped you.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.