Mark's brother is 5 years older than mark their combined ages add up to 23 how old is my make sure you have expression for Mark and another one for his brother

Mark is 9 and his brother is 14.

The expression for Mark: 23 - 9 = 14

The expression for his brother: 23 - 14 = 9

Step-by-step explanation:

We know that 14 is 5 more than 9, and Mark is the younger one so he would be 9 and his brother 14. 9 + 14 also equals 23, so thats how you know you have the right answers.

details

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