Keiko works as a tutor for $8 an hour and a waitress for $9 an hour. this month, she worked a combined total of 100 hours at her two jobs. let t be the number of hours keiko worked as a tutor this month. write an expression for the combined total dollar amount she earned this month.

Step-by-step explanation:

You have the following information given in the problem:

- She  works as a tutor for $8 an hour and a waitress for $9 an hour.

- The total hours she worked  at her two jobs is 100 hours.

 Therefore, have:

( is the total of hours she worked at his job as a waitress)

( is the total dollar amount she earned this month)

Substitute into the and simplify. Then, the expression asked is:

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)