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shtirl [24]
3 years ago
15

Oscar painted1/6 of a wall in 2/3hours at this rate how many hours will it take him to paint the whole wall?

Mathematics
1 answer:
topjm [15]3 years ago
8 0

Answer:

b

Step-by-step explanation:

the answer is b because you add all those together then boom

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What is an equation of the line that is perpendicular to −x+2y=4 and passes through the point (−2, 1) ?
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y=-2x-3

Step-by-step explanation:

Since our equation is in standard form Ax+By=C we must first manipulate the equation so that we have it in the slope-intercept form such that y=mx+b.  Therefore:

-x+2y=4\\2y=x+4\\\\y=\frac{x+4}{2}\\\\y=\frac{1}{2}x+2

Therefore, our slope is 1/2 and our y-intercept is 2.  Now in order to determine a perpendicular line to the one stated above we must then get the negative inverse of our slope meaning \frac{1}{2}=-2 (negative reciprocal).  Now we must use the point slope formula:

y=m(x-x_1)+y_1

Where m is the slope, x1 is -2 and y1 is 1 (because of the ordered pair given). And so:

y=-2(x-(-2))+1\\\\y=-2(x+2)+1\\\\y=-2x-4+1\\\\y=-2x-3

Therefore, the line that is perpendicular to -x+2y=4 is y=-2x-3.


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