Mathematics, 17.07.2019 10:30 NetherisIsTheQueen

How do units you to better understand a problem? how do units sometimes get in the way of solving a problem? give examples that support your ideas. (brainliest to anyone who answers! ) you!

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Answer from: deer15

Units can help you better understand a question because it can help the problem be more "real life" and the ability to comprehend it will become simpler also. If doing a difficult question, solving a difficult inequality, for example, coming up with units to fit it may make going through the process of understanding it easier. For a problem that involves measurements, units can make it seem like a probable event that will unconsciously propel you to want to understand how to figure out how to reach the solution to a question. That is why units can be quite helpful in understanding a question.

Units sometimes get in the way of solving a question because they are a possible distraction to the real task at hand. In geometry, the different units can make conversions confusing, and the squares and cubes not help the solution be more clear.

Answer from: Quest

none of the above.

for one of the equations to be used in the process, there has to be a $2x^2$ term in the equation since $2x$ squared is $2x^2$ .

since there is only a $x^2$ term in the first equation, we cannot derive a $2x+4$ from completing the square.

solving with completing the square

$x^2=-4x+3$

$x^2+4x=3$

$x^2+4x+4=7$

$(x+2)^2=7$

$x+2=+-\sqrt{7}$

$x=2+-\sqrt{7}$

Answer from: Quest

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

$ab^2+ac^2=bc^2$

$ab^2+ac^2=x^2$ )

triangle abd and cba are similar,

$\frac{ab}{bc}=\frac{bd}{ab}$

$ab^2=bc\cdot bd$

$25=bc\cdot bd$ (2)

triangle cad and cba are similar,

$\frac{ac}{bc}=\frac{cd}{ac}$

$ac^2=bc\cdot dc$

$7\times 7=bc\cdot dc$

$49=bc\cdot dc$ )

using (1), (2) and (3), we get

$25+49=x^2$

$74=x^2$

hence proved.

therefore option 2 is correct.

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