You multiply 0.09 by 10 and that'd equal 0.09. A number 10 times greater then 0.009 is 0.09.
The steps involved in <span>practical problem solving are as follows:
</span><span>Assign an identifying variable to the quantity to be found.
</span>
<span>Write a sentence stating conditions placed on the quantity.
</span>
<span>Solve the sentence for the variable.</span>
Answer:
![\boxed{D. \: 40\degree}](https://tex.z-dn.net/?f=%20%5Cboxed%7BD.%20%5C%3A%2040%5Cdegree%7D%20)
Step-by-step explanation:
<em>Angle sum property of triangle states that the sum of interior angles of a triangle is 180°</em>
So,
![= > 2y \degree + (y + 10)\degree + 50\degree = 180\degree \\ \\ = > 2y\degree + y\degree + 10\degree + 50\degree = 180\degree \\ \\ = > 3y\degree + 60\degree = 180\degree \\ \\ = > 3y\degree = 180\degree - 60\degree \\ \\ = > 3y\degree = 120\degree \\ \\ = > y = \frac{120\degree}{3\degree} \\ \\ = > y = 40\degree](https://tex.z-dn.net/?f=%20%3D%20%20%3E%202y%20%5Cdegree%20%2B%20%28y%20%2B%2010%29%5Cdegree%20%2B%2050%5Cdegree%20%3D%20180%5Cdegree%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%3E%202y%5Cdegree%20%2B%20y%5Cdegree%20%2B%2010%5Cdegree%20%2B%2050%5Cdegree%20%3D%20180%5Cdegree%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%3E%203y%5Cdegree%20%2B%2060%5Cdegree%20%3D%20180%5Cdegree%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%3E%203y%5Cdegree%20%3D%20180%5Cdegree%20-%2060%5Cdegree%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%3E%203y%5Cdegree%20%3D%20120%5Cdegree%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%3E%20y%20%3D%20%20%5Cfrac%7B120%5Cdegree%7D%7B3%5Cdegree%7D%20%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%3E%20y%20%3D%2040%5Cdegree%20)
The area of the triangle below is 7.5 units
Left side: (equation) 2/x=3/90 (multiply them together by cross multiplying. 90x2 divided by 3)
=60
Altogether: 90 (right) + 60 (left) =150 seats in total