Create a matrix. use a graphing calculator to solve the system using the rref function. -11x-4y=36
5x+5y=-10

Step-by-step explanation:

Arrange the equations so that all the variables are in columns (x as the first column, y as the second, equals a number as the third):

-11x - 4y = 36

5x + 5y = -10

Define and edit Matrix A.  We need a 3 x 2 matrix.  Input the coefficients and constant:

Find rref function, enter matrix A:  rref([A])  (press enter)

This gives you:

which means:

muyb ajo

step-by-step explanation:

jegosu

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