Solve the following system: y=x + 3
2x + y = 9

Answers:
(2,5)
(5,2)
(-2,5)
(2,-5)

Step-by-step explanation:

y - x = 3 ...1

2x + y = 9 ...2

...2 - ...1

2x + y -y + x = 9 - 3

3x = 6

x = 2

replace x you will receive y value

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