Translate the sentence into an equation. Twice the difference of a number and 4 is 9. Use the variable y for the unknown number.

2x-4=9

Step-by-step explanation:

2x-4=9

2x=y

2x=13

i dont know

step-by-step explanation:

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