What is the mean of 20, 50, 70, 80, 30, 60, 20, 70, 70, 90?

56

Step-by-step explanation:

20+50+70+80+30+60+20+70+70+90= 560

560 divided by 10= 56

Mean (10, 20, 30, 40, 50, . . . . , 90, 100) = 55

Step-by-step explanation: i think is the answer

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