In 10 weeks, the value of bob treatmans day trading account decreased by $500. what was the average weekly change in the value of the account expressed as a signed number ?
$48 per week
$50 per week
$-52per week
$-56 per week

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212