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Paladinen [302]
3 years ago
12

Can someone help me?? Please

Mathematics
2 answers:
Tomtit [17]3 years ago
4 0

Answer:

3 lunches

Step-by-step explanation:

joja [24]3 years ago
3 0
6x3 is 18 so 1 x 3 is 3 the answer is 3
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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 <u>to</u> the airport (in mph)

⇒ v + 15 = average speed driving <u>from</u> 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)

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neonofarm [45]

Answer:

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Step-by-step explanation:

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Stolb23 [73]

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Step-by-step explanation:

Subtract 5 from each side, which leaves you with 3x=-12. Then divide each side by 3. Then that leaves you with x=-4

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Answer:

1885

Step-by-step explanation:

since Alley already got her share it means 22500 - 3650 Which is 18850 then divide that by 10 since it was divided equally

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2 years ago
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XY=5x,YZ=x, and XY=25
Tems11 [23]

Answer:

Step-by-step explanation:

If you're looking for x it is 5 which also makes YZ equal 5

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