Lines of symmetry in regular polygons can be formed from a vertex to an opposite vertex or a vertex to an opposite midpoint.
X³ - 2x² - 5x = 0
First, take common factor:
x(x^2 - 2x - 5 )= 0
Now use the quadratic formula to find the roots of the trinomial
x = [- b +/- √(b^2 - 4(a)(c)] / 2a
x = [2 +/-2√6 ]/2
x = 1 + √6 and x = 1 -√6
Then the solutions are:
x =0; x = 1 + √6; x = 1 - √6
That is the las option shown.
$3.50
702/18= 39 (so you have 39 boxes of cookies)
$136.50/39= $3.50 (so each box cost 3.5)
3.5 x 39= 136.5
Answer: 30 degrees
Step-by-step explanation:
90 - 60 = 30