Two fire hoses are used to extinguish a fire. hose a, when turned on alone, can extinguish the fire in 7 minutes, while hose b takes "n" minutes more time than hose a. find an expression (in terms of "n") for how much of the fire they will extinguish in 1 minute when both hoses are turned on together.

The expression in terms of "n" for how much of the fire they will extinguish in 1 minute when both hoses are turned on together is

Solution:

Given that,

Hose A, when turned on alone, can extinguish the fire in 7 minutes

Hose B takes "n" minutes more time than hose A

Hose takes (n + 7) minutes to extinguish the fire

STEP 1: Calculate how much work (here work is to extinguish the fire) each person does in one minute

STEP 2: Add up the amount of work done by each person in one minute

Work done in one minute when both are working together:

Therefore, the expression in terms of "n" for how much of the fire they will extinguish in 1 minute when both hoses are turned on together is:

452,489 to the nearest thousand is 452,000

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option