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Nitella [24]
3 years ago
11

Essential: Solve the proportions step by step ​

Mathematics
1 answer:
vazorg [7]3 years ago
6 0

Answer:

The value of r=\frac{-106}{47}

The value of x=\frac{83}{32}

Step-by-step explanation:

Given that,

A) \frac{2r-2}{7r+10} = \frac{9}{8}

Now,

\frac{2r-2}{7r+10} = \frac{9}{8}

8(2r-2)=9(7r+10)

16r-16=63r+90

-16-90=63r-16r

-(16+90)=47r

-106=47r

r=\frac{-106}{47}

B) \frac{x+4}{9} = \frac{3(x-2)-1}{5}

Now,

\frac{x+4}{9} = \frac{3(x-2)-1}{5}

5(x+5)=9[3(x-2)-1]

5x+25=9[3x-6-1]

5x+25=9[3x-7]

5x+25=27x-63

25+63=27x+5x

83=32x

x=\frac{83}{32}

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Step-by-step explanation:

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3 years ago
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3 years ago
A small airplane can fly 12 miles in 3 minutes. At this rate, how far can it fly in 7 minutes? In an hour?
Kay [80]

Answer:

28 miles in 7 minutes, 240 miles in an hour

Step-by-step explanation:

We can first simplify the rate to miles per minute. Since the plane goes 12 miles in 3 minutes, we can divide it by 3 to find how much it travels in one minute. 12 divided by 3 is 4 and 3 divided by 3 is 1

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7 0
3 years ago
A=8, b=2, and c= 1/2<br><br> ab= ?<br><br> ca=?<br><br> 4a=?
jarptica [38.1K]

Answer:

ab=16

ca=4

4a=32

Step-by-step explanation:

a*b=8*2=16

c*a=1/2*8=4

4*a=4*8=32

hope it helped xx

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3 years ago
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I believe that it is 5 1/2
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