Find the values of a and b so that the solution of the linear system is (5,2)ax+by=23ax-by=7

a = 10 and b= 4

Step-by-step explanation:

x =5 y = 2

5a + 2b = 23(1)

5a - 2b = 7(2)

(1) -(2)

4b = 16

b = 16/4

b = 4

also, (1) + (2)

10a =30

a = 30/10

a = 3

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