Answer:
90 red pens
Step-by-step explanation:
we need to find the least common multiple of the numbers 3 , 5 , 6 , 9
6 = 2 × 3
9 = 3²
then
LCM(3,5,6,9) = 2×5×3² = 2×5×9 = 90
The number 90 can be divided into 3 ,5 ,6 ,9 with no remainder 
Therefore the pack must have 90 pens or a multiple of 90
For example 180 , 270 ...
 
        
             
        
        
        
Parallel is the answer 
Perpendicular and intersecting lines both have and intersection point 
Skew lines don't interest but they are not coplanar 
        
                    
             
        
        
        
Answer:
Vertex (2,2)
y- Intercept is 10
On problems like this, use Desmos Graphing. It helps a lot.
 
        
                    
             
        
        
        
Answer:
93.15 
Step-by-step explanation:
Multiply 230.00 dollars and 0.55 = 126.50 
Subtract 230.00 dollars and 126.50 = 103.50 
Multiply 103.50 and 0.10 = 10.35
Subtract 103.50 and 10.35 = 93.15