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3 years ago

If x=0 , which of the following is equivalent to the expression below

Geography

1 answer:

MrRissso [65]3 years ago

6 0

D. 4x^2 - 3 is the correct answer. This is because we just break the original expression down into two fractions and then simplify them

(8x^3 - 6x)/2x becomes these two fractions:

8x^3/2x - 6x/2x

These two simplify down to your answer, 4x^2 - 3

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3-In groundwater replenishment system in Orange County, CA, treated domestic sewer is injected into underlying aquifers using in

lina2011 [118]

Answer:

In groundwater replenishment system in Orange County, CA, treated domestic sewer is injected into underlying aquifers using injection wells.

False

Explanation:

In the orange country's water treatment system techniques like micro filtration , and ultraviolet ( UV ) , reverse osmosis (RO) disinfection with hydrogen peroxide are used for purification . Generally at the source polluted water is first micro - filtered for the removal of small suspended particles bacteria , protozoa , and harmful virus from water . The water is then filtered via RO , which removes salts , pesticides , viruses and most organic compounds are passed in the presence of the forced water via thin plastic membrane , and in the final stage , the water is treated with hydrogen peroxide and UV light as a precautionary measure.

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3 years ago

Which statement below is true about earth's hydrosphere?

Ulleksa [173]

D. three-quarters of earth's water is fresh water.

7 0

4 years ago

Read 2 more answers

On a coordinate plane, a line goes through (negative 3, negative 3) and (negative 1, 5). What is the equation of the line parall

DENIUS [597]

Answer:

y=4x-16

Explanation:

The general form of the equation of a line is: y=mx+x, where m is the gradient and c is the y-intercept.

Given points (-3,-3) and (-1,5)

We are to find the equation of the line parallel to the given line with an x-intercept of 4.

First, we determine the value of the gradient of the line.

Gradient,

$m=\frac{y_2-y_1}{x_2-x_1} \\=\frac{5-(-3)}{-1-(-3)} \\=\frac{5+3}{-1+3}\\=\frac{8}{2}\\m=4$

Two lines are parallel if their gradients $m_1 \: and \: m_2$ are equal.

The gradient of the line parallel to the given line $m_2=4$

Since the x-intercept of the new line is 4, a point on the new line, $(x_1,y_1)=(4,0)$

Substituting $(x_1,y_1)=(4,0)$ into the equation of a line: , $y-y_1=m(x-x_1),$ we have:

$y-0=4(x-4)\\$Therefore:\\y=4x-16$

Therefore, the equation of the line is: y=4x-16

6 0

3 years ago

Read 2 more answers

Why have the birth rates decreased in asia, africa, and south america in the recent decades?

Goshia [24]

The increasing amount of usage of sexual protection.

5 0

3 years ago

Tommy and Erin are building a skateboard ramp. They want the ramp to be 3 feet tall and 5 feet long.

BARSIC [14]

Answer:

Full question is attached.

Tommy's reasoning is wrong because the hypotenuse is not 5 feet.

A skateboard ramp resembles a right angles triangle so its sides resemble that of a right angled triangle.

The height of 3 feet would be the height of the triangle.

The length of 5 feet would be the length of the triangle.

The piece of plywood that would cover the top of the frame would be the hypotenuse.

In using the Pythagoras rule, the c is the hypotenuse but Tommy made the mistake of assuming that the hypotenuse was b which is where the error came from.

Instead of solving for b, they should have been solving for c which is the hypotenuse.

a² + b² = c²

3² + 5² = c²

9 + 25 = c²

c² = 34

c = √34

c = 5.83 feet

They should use a plywood of 5.83 feet not 4 feet.

6 0

3 years ago