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3 years ago

10

Find the slope of a line through each pair (8,10),(-7,14)

1 answer:

allochka39001 [22]3 years ago

5 0

First u have to find Y2-Y1/X2-X1 , so u will replace the number to the y and x value.
step1: subtract Y2 and Y1. then find the different of x_value, which is 14-10/-7-8
step2: after u find the differences, u will get 4/(-15) .
finally, you will get a slope. y=4/-15x+b.

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<u><em>Explanation</em></u>

Lets assume, length of one base is $x$ ft.

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Given in the question: $A= 477$ and $h= 18$

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$A= \frac{1}{2}(a+b)h\\\\ 477=\frac{1}{2}(x+5x-19)*18\\\\ 477=9(6x-19)\\\\477= 54x-171\\\\477+171=54x\\\\648=54x\\\\x=\frac{648}{54} = 12$

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