Hot air balloons generally descend at a rate of 200 to 400 feet per minute. four balloons descend 295 feet per minute for 7 minutes. find the total change in altitude for all 4 balloons.

make a proportion

Let x = the amount of feet descended in 3 minutes (thus the total change of altitude of the balloon)

320 (feet per minute) / 1 (minute) = x (feet per minute) / 3 (minutes)

1) Divide: 320/1 = 320.
2) Multiply: 320 x 3= 960.

The balloon that descends at a rate of 320 feet/minute (so, every minute, it descends 320 feet) descends a total of 960 feet in 3 minutes.

The balloon's total change in altitude is -960 feet.

what steps are you having us

step-by-step explanation:

third choice down

step-by-step explanation:

the first inequality is based on the number of adults and campers, and the second inequality is based on the cost of feeding both the adult and the camper.

we know that there is room for 525 people max.   it's ok to have less than 525, but it's not ok to have more than 525, so the inequality is less than or equal to.   the number combination of adults (x) and campers (y) cannot exceed this 525 max.   therefore:

x + y ≤ 525

now we talk about cost.   it costs $9 to feed one adult, so depending upon the number of adults you have (x) depends upon how much it will cost to feed that number of adults.   same with the campers, who cost $5 to feed.   the adults can be represented by 9x and the campers can be represented by 5y.   since the budget cannot exceed 1,200, the second inequality is:

9x + 5y ≤ 1200