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2 years ago

Solve 3x+9 so it has no solution.

Mathematics

1 answer:

Serjik [45]2 years ago

5 0

Answer:

x = -3

Step-by-step explanation:

I hope you mean "no solution" as in 'equal to zero' because that's what I'm doing and what makes sense.

Start by setting the equation equal to zero.

3x + 9 = 0

Subtract the 9 from both sides to move it to the right side.

3x = -9

Divide the 3 from both sides to isolate the x.

x = -3

We can check that x = -3 is the correct answer by plugging it in and seeing if it equals zero.

3(-3) + 9

-9 + 9

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Answer:

Step-by-step explanation:

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2 years ago

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2 years ago

If you wish to warm 40 kg of water by 18 ∘C for your bath, find what the quantity of heat is needed. Express your answer in calo

Harman [31]

Answer:

Quantity of heat needed (Q) = 722.753 × 10³

Step-by-step explanation:

According to question,

Mass of water (m) = 40 kg

Change in temperature ( ΔT) = 18°c

specific heat capacity of water = 4200 j kg^-1 k^-1

The specific heat capacity is the amount of heat required to change the temperature of 1 kg of substance to 1 degree celcius or 1 kelvin .

So, Heat (Q) = m×s×ΔT

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