Does a trapezoid have exactly one pair of congruent sides sometimes, always, never

2 answers:

5 0

For me it is somethimes Because if th base 1 and base 2(which is always not congruent) can form a square, then if u draw a line with it then u can make right triangle with same sides which can use as a 45 45 90 or 30 60 90. Hope is helps

wariber [46]3 years ago

5 0

A trapezoid has congruent sides sometimes

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It takes Emily eight hours to paint her house. Mike can paint the same area in nine hours. Find how long it would take them if t

emmasim [6.3K]

It will take them 4.24 hours together to paint the area together

Step-by-step explanation:

If Emily takes eight hours to paint the area then she will paint 1/8 of the house in one hour

Similarly, if Mike can paint the same area in 9 hours, then he will paint 1/9 of the same area

Let x be the number of hours in which they will together paint the area.

If x hours are taken by them to paint the area then 1/x of the area will be painted in one hour

So,

$\frac{1}{8}+\frac{1}{9}=\frac{1}{x}\\Multiplying\ both\ sides\ with\ the\ LCM\\72x\\(72x)*\frac{1}{8}+(72x)*\frac{1}{9}=72x * \frac{1}{x}\\9x+8x=72\\17x=72\\Dividing\ both\ sides\ by\ 17\\\frac{17x}{17}=\frac{72}{17}\\x=4.24\ hours$