Which sentence explains the correct first step in the solution of this equation? 4(x−3)=9

you ride your bike X miles per hour up a mountain for 45 minutes on the way

We convert minutes into hour because speed is in miles per hour

To convert minutes into hour we divide by 60

45 minutes =

it takes 20 minutes to ride your bike down the mountain

20 minutes =

you ride your bike X miles per hour up a mountain

Distance = speed * time taken

distance covered while riding bike up a mountain is

D = x *0.75

on the way down the mountain you ride your bike for 4 miles per hour faster

So time taken is x + 4

distance covered while riding bike up a mountain is

D =  (x+4) * 0.33

Distance covered by climbing up and down the mountain are same

so we make the distance equation equal

x *0.75=  (x+4) * 0.33

0.75x = 0.33x + 1.32

Subtract 0.33 from both sides

0.42x = 1.32

Divide both sides by 0.42

x = 3.1429  miles per hour

Distance covered up D = 0.75* x = 0.75 * 3.1429 = 2.357175

Distance covered down D = (3.1429 +4) * 0.33 =  2.357157

Total distance covered = 2.357175 + 2.357175 = 4.71435

you ride your bike in total of 4.71 miles approximately .

Answer:

The total distance covered during riding up and down the mountain is 4.714 miles.

Step-by-step explanation:

Speed of the bike while riding  up mountain = X mile/hour

Distance covered be d.

Time taken to cover d distance = 45 minutes = 0.75 hour

(1 hour = 60 min)

...(1)

Speed of the bike while riding  down mountain = (X+4) mile/hour

Distance covered while moving down the mountain = d.

Time taken to cover d distance = 20 minutes = 0.33 hour

...(2)

O solving (1) and (2):

we get, d = 2.357 miles

X = 3.143 miles/hour

Total distance covered by us = d + d= 2.357 miles+ 2.357 miles = 4.714 miles

Answer:

The answer is 0.42525 TONS (METRIC)

For this case, the first thing we must do is define variables.

We have then:

x: number of years

y: elevation in feet

Then, we write the equation that models the problem.

We have then:

Then. for an elevation of -31 feet we have:

From here, we clear the number of years.

We have then:

Answer:

It will take for the floor to have an elevation of -31 about 11 years.

Answer

5 2/3

Step-by-step explanation:

Answer:

Hσρҽ I ԋҽʅρҽԃ

Step-by-step explanation:

12 / 15 ÷ 1 / 5

12/ 15 × 5

(cross multiply 5 and 15)

12/ 3

(multiply by 3)

4