Solve the system x + 7y = 16 and 3x - 7y = 4 for x. *

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

Shannon drove for 540 minutes. if she traveled 65 miles per hour, how many total miles did she travel?