What do x equal-2(x+5)=4

Mathematics

2 answers:

Kitty [74]3 years ago

8 0

Answer:x=-7

Because -2 times x makes it -2x and times 5 makes it 10 so it would be -2x-10. you add 10 to get rid of the it and add ten to the 4 now it’s -2x=14 now you divide by -2 and it’ll equal x=-7

valkas [14]3 years ago

3 0

X=-7 because of the distribution property. Once you do that you can solve as normal

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An aquarium tank can hold 6300 liters of water. There are two pipes that can be used to fill the tank.The first pipe alone can f

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Answer: it will take them 28 minutes to fill the tank.

Step-by-step explanation:

The first pipe alone can fill the tank in 84 minutes. This means that the rate at which the first pipe fills the tank per minute is 1/84

The second pipe can fill the tank in 42 minutes by itself. This means that the rate at which the second pipe fills the tank per minute is 1/42

If they work together, they would work simultaneously and their individual rates are additive. This means that their combined rate of filling the tank would be

1/84 + 1/42

Assuming it takes t hours for both pipes to fill the tank working together, the working rate per minute would be 1/t. Therefore,

1/84 + 1/42 = 1/t

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4 years ago

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