Javier wanted to make a profit of $80 for selling the 4 vases he had made. He had spent $12 for materials. Since he planned to charge the same price for each vase, he used the following equation to determine x, the price he would charge: 4x - 12 = 80 How much did Javier plan to charge for each vase?

When a solar flare occurs on the Sun, it can send out a blast wave that travels through space at a speed of 1.875 × 106 miles per hour. How would this speed, in miles per hour, be written as a decimal number?  

A real estate agent has an appointment to show a house to a couple who lives out of town. It will take the couple 2½ hours to drive to the house, but the real estate agent can get there in 45 minutes. If the couple left at 15 P.M., at what time should the real estate agent leave to arrive at the house at the same time?

Exhibit: At the beginning of the experiment, what was the height (in centimeters) of the small plants that were not fertilized?  

Byron charged Theresa $4750, including the cost for transporting the materials, to refloor a room in her house. What was the area, in square feet, of the room?