chemistry 120°, physics 90° biology 80°and mathematics all in a pie chart. shows the distribution of students in A-level classes in a certain school, if 28 students offered mathematics, how many students were all together in the Four classes?

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

m

step-by-step explanation: