PLEASE HELP This unit focused, in part, on relationships in triangles. A triangle is the simplest type of polygon and is frequently used in construction. Explain why triangles are often used to build bridges, roofs, buildings, and other structures. Which properties of a triangle make it a desired geometric shape for these applications? Which type of triangle is best? Why is the triangle preferred over other types of polygons? Explain.

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

d. corresponding side lengths in similar triangles are proportional in length.

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.