What is the correct first step to solve this system of equations by elimination? (2x−3y=−6) (x+3y=12)
What is the solution? Write the ordered pair using integers or fractions.

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.