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Mathematics, 09.02.2020 23:32 johnisawesome999

The length of a side of a triangle is 26 in. A line, parallel to the given side, divides the triangle into two parts of equal areas. Find the length of the segment cut from the line by the other two sides of the triangle.

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Answers: 3
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Answer from: Quest

c is the correct answer

step-by-step explanation:

9. find the determinant of k. a. 671 b. 913 c. 1 d. 597
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Answer from: Quest

solution:

the given function is ,

f(x) = 4 x^3 - 72 x^2 + 320 x,

      = 4x( x^2- 18 x + 80)\\\\ 4 x(x^2-10 x -8 x + 80) \\\\ 4 x[(x-10)(x-8)]

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

f(x) = a x^3+ b x^2 + c x+d,

sum of the roots = a + b +c= 0+8+10=18=   \frac{-b}{a}

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =   \frac{c}{a}

product of roots = a b c = 0=   \frac{d}{a}

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function f(x) = 4 x^3 - 72 x^2 + 320 x, is given by entry and exit route of this hall.

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