Calculate from sea level, the biosphere goes up about 9km and down 19km. What is the thickness of the biosphere in meters?

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

What is the range? can’t seem to find it out

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?