Ok, so here your being asked to solve 6x2<span> + 5x = -7 
The procedure that I did was using this formula it led me to get the following:
</span>Using the formula: 
x = -(-5) ± √(-5)² - 4(6)(-6)/ 2(6) 
x = 5 ± √ 25 + 144 / 12 
x = 5 ± √ 169 / 12 
x = 5 ± 13/12 
x1 = 5 + 13/12 
x1 = 18/12 
x1 = 3/2 
x2 = 5 - 13/12 
x2 = -8/12 
<span>
x2 = - 2/3 
Hope this helped :)</span>
        
             
        
        
        
Answer:
280 ft squared
Step-by-step explanation:
To find the area of the nonshaded portion, we can find the area of the entire floor and then subtract the shaded area.
The total area is that of a rectangle: 30 * 15 = 450 ft squared.
Now, the shaded region is made up of a rectangle and a triangle.
- The rectangle has length 8 and width 10, so its area is 10 * 8 = 80 ft squared.
- The triangle has base 12 and height 15, so using the area of a triangle formula:  (where b is the base and h is the height) = (12 * 15)/2 = 180/2 = 90 ft squared.
 (where b is the base and h is the height) = (12 * 15)/2 = 180/2 = 90 ft squared.
- The total shaded region is: 80 + 90 = 170 ft squared
Subtract 110 from 450: 450 - 170 = 280 ft squared.
Thus, the answer is 280 ft squared.
Hope this helps!
 
        
                    
             
        
        
        
Let "a", "b" and "с"  be sides of the triangle ("с" is the longest side). The triangle will be:
right if       a² + b² = c²
аcute if     a² + b² > c²    
obtuse if   a² + b² < c²    
We have a=10, b=14 and c=18
a² + b² = 10² + 14² = 100 + 196 = 296
and
c² = 18² = 324
296 < 324   ⇒  obtuse triangle.