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3 years ago

4 times a certain number less two times that's the same number is 10 what is the number

Mathematics

1 answer:

maxonik [38]3 years ago

5 0

Answer:

The number is 5

Step-by-step explanation:

Let the number be x,

Four times the number= 4x

two times the same number= 2x

So we have ,

4x – 2x = 10

2x = 10

x = 5

Therefore the number is 5

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3 years ago

find the point-slope equation of the line perpendicular to the line y=2x+5 passing through the point (1,4). (please include solu

pishuonlain [190]

First off, let's keep in mind that perpendicular lines have negative reciprocal slopes, hmmm so what's the slope of y = 2x + 5?

well, notice, that equation is in slope-intercept form, thus $\bf y=\stackrel{slope}{2}x+5$ .

$\bf \stackrel{\textit{perpendicular lines have \underline{negative reciprocal} slopes}}
{2\implies \stackrel{slope}{\cfrac{2}{1}}\qquad \qquad \qquad \stackrel{reciprocal}{\cfrac{1}{2}}\qquad \stackrel{negative~reciprocal}{-\cfrac{1}{2}}}$

so, we're really looking for the equation of a line whose slope is -1/2 and runs through 1,4.

$\bf (\stackrel{x_1}{1}~,~\stackrel{y_1}{4})\qquad \qquad \qquad 
slope = m\implies -\cfrac{1}{2}
\\\\\\
% point-slope intercept
\stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-4=-\cfrac{1}{2}(x-1)$

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3 years ago

Four tenths is less than which number? 0.004, 0.04, 0.4, 4

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4 years ago

4 times a certain number less two times that's the same number is 10 what is the number​

4 times a certain number less two times that's the same number is 10 what is the number