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PolarNik [594]
3 years ago
14

Please help me it's so by 8:00!!!!!!!!☹️☹️☹️☹️

Mathematics
1 answer:
Mademuasel [1]3 years ago
4 0
9 7/8,  9 3/4, 9 1/4, 10, 10 5/8, 10 3/8, 10 1/8, 10 1/2
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Dr.dillard has fifteen pounds of candy to share equally with 10 of the best behaved classes at nathan
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Each best behaved class will receive 1.5 pounds of candy.
To get his answer you just have to divide 15 by 10
15 divided by 10 = 1.5 pounds
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5+3x write in verbal expression
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Five plus free equals 7

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I added five plus three

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X is an even 3-digit integer ending to zero. Which of the following is an
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I need help real quick
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A plane flew 720 mi with a steady 30 mi/h tailwind. The pilot then returned to the starting point, flying against that same wind
NNADVOKAT [17]

Answer:

Plane's speed is 150 miles/hour

Step-by-step explanation:

Let the plane's airspeed be x

Speed of wind is 30 miles/hour

When a plane flew with the wind , Speed = (x+30)

So, the speed plain with wind on going = (x+30)

Since we are given that on returning plane fly against the wind .

So,When a plane flew against the wind , Speed = (x-30)

So, the speed plain against wind on returning = (x-30)

Distance = 720 miles .

Time = \frac{Distance}{Speed}

So, time on going  =\frac{720}{(x+30)}

Time on returning  =\frac{720}{(x-30)}

Now we are given that the total time for the whole trip (going + returning) = 10 hours.

So,  \frac{720}{(x+30)}+\frac{720}{(x-30)}=10

\frac{720x-21600+720x+21600}{(x+30)(x-30)}=10

720x-21600+720x+21600=10(x+30)(x-30)

720x+720x=10(x+30)(x-30)

1440x=10(x^2 -[30]^2)

144x=x^2 -900

x^2-144x -900=0

x^2-150x+6x -900=0

x(x-150)+6(x -150)=0

(x-150)(x+6)=0

x= 150,x= -6

So, the plane's speed is 150 miles/hour

4 0
3 years ago
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