The twelfth term of a linear sequence is 47 and the sum of the first three terms is
21.
(a) Find the first term and the common
difference.
(b) Find the sum of the first 15 terms of
the sequence.

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

stops on an even number.

answer: options

step-by-step explanation: