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4 years ago

7-5x+1 please answer i need this NOW!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Alisiya [41]4 years ago

5 0

Answer:x=8/5 or 1.6

Step-by-step explanation:

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A research team aboard an underwater research vessel descends 800 feet below sea level. They then rise 480 feet before descendin

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Find the area of a trapezoid whose height is 2 meters and whose bases are 6 meters and 10 meters

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16 m^2

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3 years ago

You are pulling up an anchor while on a boat. You pull up the anchor at a rate of 0.5 feet per second. After 6 seconds, the anch

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3 years ago

Riding a bike a person takes 20 minutes to go to work. The trip back home takes 30 minutes. If the rate back is 8 mph slower tha

Ghella [55]

<h2>Answer:</h2>

Trip to work has rate: 24 mph

Trip back to home has rate: 18 mph

Distance to work is: 480 m

<h2>Step-by-step explanation:</h2>

We know that speed is defined as the ratio of distance to time.

i.e.

$Speed=\dfrac{Distance}{Time}$

Let the distance traveled to work be: x m.

Now, while going to work it takes a person 20 minutes.

This means that the speed of the person while going to work is:

$S_1=\dfrac{x}{20}$

Also, the time taken to come back home is: 30 minutes.

This means that the speed of person while riding to home is:

$S_2=\dfrac{x}{30}$

Also, it is given that the rate back is 8 mph slower than the trip to work.

This means that:

$S_1-S_2=8$

i.e.

$\dfrac{x}{20}-\dfrac{x}{30}=8\\\\i.e.\\\\\dfrac{30x-20x}{600}=8\\\\i.e.\\\\\dfrac{10x}{600}=8\\\\i.e.\\\\\dfrac{x}{60}=8\\\\i.e.\\\\x=480\ \text{m}$

Hence, the distance to work is: 480 m.

Also, the rate while going to work is:

$=\dfrac{480}{20}\\\\=24\ \text{mph}$

and the trip back to home is covered with the speed:

$=\dfrac{480}{30}\\\\=16\ \text{mph}$

6 0

3 years ago