An electronics store makes a profit of $30 for every portable dvd player sold and $60 for every dvd recorder sold. the manager’s target is to make at least $250 a day on sales of the portable dvd players and dvd recorders. write an inequality that represents the number of both kinds of dvd players that can be sold to reach or beat the sales target. let p represent the number of portable dvd players and r represent the number of dvd recorders. a. 60p + 30r ≥ 250 b. 30p + 60r ≤ 250 c. 30p + 60r ≥ 250 d. 30p + 60r > 250

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Asinusoidal function whose frequency is 1/6pi

Arrange the steps to solve this system of linear equations in the correct sequence. x + y = -2 2x – 3y = -9 tiles subtract 3x + 3y = -6 (obtained in step 1) from 2x – 3y = -9 (given) to solve for x. substitute the value of x in the first equation (x + y = -2) to get y = 1. the solution for the system of equations is (-3, 1). x = -15 the solution for the system of equations is (-15, 13). add 3x + 3y = -6 (obtained in step 1) to 2x – 3y = -9 (given), and solve for x. x = -3 substitute the value of x in the first equation (x + y = -2) to get y = 13. multiply the first equation by 3: 3(x + y) = 3(-2) 3x + 3y = -6.