from 1980 to 2000, the annual profit of a company was determined by subtracting the product of $25,000 and the number of years either before or after 1990 from $625,000. Which of the following equations below could be used to determine in which year, x, the profit was $550,000?

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Based on the figures as marked, /\rqs = —

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?