7:12 is equivalent to 21:​

36

Step-by-step explanation:

21/7=3

12x3=36

7:12 = 21:36

21/36

Step-by-step explanation:

To get from 7 to 21 we multiply to 3 so you would do the same for the bottom

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