2 years ago

For what value of x is the rational expression below equal to zero?

Mathematics

1 answer:

pentagon [3]2 years ago

6 0

Answer:

A.-10 should be the answer to the question..

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Suppose that y varies directly with x and y = 10 when x = 20. What is y when x = 15?

aev [14]

Given that,

y varies directly with x and y = 10 when x = 20.

To find,

The value of y when x = 15.

Solution,

$y\propto x\\\\y=kx$

Put x = 20 and y = 10

$k=\dfrac{y}{x}\\\\k=\dfrac{10}{20}\\\\=\dfrac{1}{2}$

Put k = 1/2 and x = 15 to find the value of y.

$y=\dfrac{1}{2}\times 15\\\\=7.5$

So, the value of y is 7.5

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A survey is being conducted in a city with 1 million residents. It would be far too

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Answer: Find answers in the attached documents

Step-by-step explanation:

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3 years ago

75% of 7th graders are returning to school. If there are 300 7th graders returning to school, how many total 7th graders are the

bagirrra123 [75]

Answer:

there are 350 in all of the 7th grade

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2 years ago

Solve the inequality.<br> 4x + 3 < 7 or 3x – 8 > 7<br> -<br> x < [?] or x > [

ss7ja [257]

Answer:

$4x + 3 < 7 \\ 4x + 3 - 3 < 7 - 3 \\ 4x < 4 \ \\ 4x \div 4 < 4 \div 4 \\ x < 1$

$3x - 8 > 7 \\ 3x - 8 + 8 > 7 + 8 \\ 3x > 15 \\ 3x \div 3 > 15 \div 3 \\ x > 5$

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2 years ago

The volume of a cylinder can is 1.54 litre and area of base is 77cm^2 Find its height

goblinko [34]

Answer:

The height is 20 cm.

Step-by-step explanation:

First, we have to know that the volume formula is V = πr²h and the base area of cylinder is a circle. So we can let πr² be 77 cm² . Then we have to substitute the following values into the formula :

$v = 1.54 \: l$

$v = 1540 \: {cm}^{3}$

$v = \pi \times {r}^{2} \times h$

Let πr² be 77,

Let v be 1540,

$1540 = 77 \times h$

$77h = 1540$

$h = 1540 \div 77$

$h = 20 \: cm$

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3 years ago