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3 years ago

Which of the following equations have no solution? Select all that apply.

Mathematics

2 answers:

lana [24]3 years ago

3 0

The answer should be B and A

Zolol [24]3 years ago

3 0

Answer:

Since Modulus of any real number is a positive Real number.

That is modulus is defined as

| x |= x, if x>0

and -x , if x<0.

=0 , if x=0.

|x|≠ -9,

and , |x|≠-7,

∵ modulus of real number is always Positive.

So, option A |x| = -9

and Option B,|x| = -7

are equation having no solution.

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Answer:

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2 years ago

You can text 44 words in 1 minute. Write a proportion to help you find

Natalka [10]

Answer:

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Step-by-step explanation:

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2 years ago

When a cylindrical tank is filled with water at a rate of 22 cubic meters per hour, the level of water in the tank rises at a ra

Sergeu [11.5K]

Answer:

$r=\sqrt{10}\text{ m}$

Step-by-step explanation:

We have been given that when a cylindrical tank is filled with water at a rate of 22 cubic meters per hour, the level of water in the tank rises at a rate of 0.7 meters per hour. We are asked to find the approximate radius of tank in meters.

We will use volume of cylinder formula to solve our given problem as:

$V=\pi r^2h$ , where,

r = Radius,

h = Height of cylinder.

Since the level of water in the tank rises at a rate of 0.7 meters per hour, so height of cylinder would be $h = 0.7$ meters at $V=22\text{ m}^3$ .

Upon substituting these values in above formula, we will get:

$22\text{ m}^3=\frac{22}{7}\cdot r^2(0.7\text{ m})$

$22\text{ m}^3=\frac{22}{10}\cdot r^2\text{ m}$

$\frac{10}{22}\cdot\frac{22\text{ m}^3}{\text{m}}=r^2$

$r^2=\frac{10}{22}\cdot\frac{22\text{ m}^3}{\text{m}}$

$r^2=10\text{ m}^2$

Now, we will take positive square root of both sides as radius cannot be negative.

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$r=\sqrt{10}\text{ m}$

Therefore, radius of tank would be approximately square root of 10 m.

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2 years ago

Jacob sells his motorbike for £112 making a loss of 12% on its original price. Work out its original price

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Answer:

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Step-by-step explanation:

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Therefore : 112 + 13%

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2 years ago