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3 years ago

Find the equation of the line Use exact numbers Thank you in advance!

Mathematics

1 answer:

Taya2010 [7]3 years ago

5 0

Answer:

the answer is 3/6 cause you go up 3 and over 6

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kodGreya [7K]

y^2 (y + 2) + 16(y + 2)

(y+2) (y^2+16)

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3 years ago

Which two fractions have a sum of - 7/24

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4 years ago

2 - X<-7 (x > 9) solve and graph

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4 years ago

PLEASE HELP ASAP 5TH GRADE

natka813 [3]

Answer:

The answer would be B.

Step-by-step explanation:

Hope this helps.

5 0

3 years ago

Dwayne drove 18 miles to the airport to pick up his father and then returned home. On the return trip he was able to drive an av

Nesterboy [21]

Answer:

30 mph

Step-by-step explanation:

Let d = distance (in miles)

Let t = time (in hours)

Let v = average speed driving to the airport (in mph)

⇒ v + 15 = average speed driving from the airport (in mph)

Using: distance = speed x time

$\implies t=\dfrac{d}{v}$

Create two equations for the journey to and from the airport, given that the distance one way is 18 miles:

$\implies t=\dfrac{18}{v} \ \ \textsf{and} \ \ t=\dfrac{18}{v+15}$

We are told that the total driving time is 1 hour, so the sum of these expressions equals 1 hour:

$\implies \dfrac{18}{v} +\dfrac{18}{v+15}=1$

Now all we have to do is solve the equation for v:

$\implies \dfrac{18(v+15)}{v(v+15)} +\dfrac{18v}{v(v+15)}=1$

$\implies \dfrac{18(v+15)+18v}{v(v+15)}=1$

$\implies 18(v+15)+18v=v(v+15)$

$\implies 18v+270+18v=v^2+15v$

$\implies v^2-21v-270=0$

$\implies (v-30)(v+9)=0$

$\implies v=30, v=-9$

As v is positive, v = 30 only

So the average speed driving to the airport was 30 mph

(and the average speed driving from the airport was 45 mph)

8 0

2 years ago

Read 2 more answers