Can somebody tell me the only correct

The equation describes the problem C.

Why?

If we need to find which of the problem situation is represented by the equation, we need to solve the equation and check which makes sense.

Checking the problem C, we can see that it's the correct option.

We have the following equation:

Solving, we have:

We can see that her sister is 30 years old.

If we substitute the value into the equation, we can see that the equation is satisfied, so, it's the correct option.

The correct option is C.

Have a nice day!

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

step-by-step explanation: