John cuts lawns for x hours a week after school at a job that pays $20 an hour. He has accepted another job cleaning windows that pays $5 an hour and works for y hours. He is able to work at most 20 hours total weekly and wants to earn at least$100 a week, working at a combination both jobs.

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

5

step-by-step explanation:

you first to choose the points and then move from then as the slope you have