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Minchanka [31]
3 years ago
7

2(x+x+12) > 100 (why does the 20 character thing exist)

Mathematics
1 answer:
arlik [135]3 years ago
3 0

Answer:

x > 19

Step-by-step explanation:

2(x+x+12) > 100

 2(2x+12) > 100

     4x+24 > 100

           4x > 76

              x > 19

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Answer:

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3 years ago
Train a is traveling at 30 mph faster than train b. If train a travels 350 miles in the same amount of time that train b travels
GalinKa [24]

Answer:

20 mph

Step-by-step explanation:

Let speed of Train a = Va mph

Let speed of Train b = Vb mph

Va = Vb + 30

Let time taken for Train a = Ta

Let time taken for Train b = Tb

time taken = distance travelled/speed

Ta = 350/Va = 350/(Vb+30)

Tb = 140/Vb

But they both travel in the same amount of time.

So, Ta = Tb

\frac{350}{v_{b} + 30}=\frac{140}{v_{b}}

Cross multiply

350v_{b} = 140(v_{b} + 30)\\\\350v_{b} = 140v_{b} + 4200\\\\350v_{b} -140v_{b} = 4200\\\\210v_{b} = 4200

Divide both sides by 210

\frac{210v_{b} }{210} \frac{4200}{210} \\\\v_{b} = 20 mph

4 0
3 years ago
Enter a negative number that is greater than -5.​
bixtya [17]

Answer:

+5 is greater that -5 and is also a opposite integer.

6 0
3 years ago
Read 2 more answers
A drawing of a man is 3 inches high. The actual man is 75
oksano4ka [1.4K]

Answer:

1 to 25

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8 0
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Which of these is a simplified form of the equation 9y + 5 = 7 + 3y + 2y?
ArbitrLikvidat [17]
We just have to solve  to get a simplified answer

we have 
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3 0
3 years ago
Read 2 more answers
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