Answer:
-5.65
Step-by-step explanation:
-4 1/4 - 1 2/5 = -5.65
 
        
             
        
        
        
Answer: vector equation r = (7+3t)i + (4+2t)j + (5 - 5t)k
parametric equations: x = 7 + 3t; y = 4 + 2t; z = 5 - 5t
Step-by-step explanation: The vector equation is a line of the form:
r =  + t.v
 + t.v
where
 is the position vector;
 is the position vector;
v is the vector;
For point (7,4,5):
 = 7i + 4j + 5k
 = 7i + 4j + 5k
Then, the equation is:
r = 7i + 4j + 5k + t(3i + 2j - k)
<u><em>r = (7 + 3t)</em></u><u><em>i</em></u><u><em> + (4 + 2t)</em></u><u><em>j </em></u><u><em>+ (5 - 5t)</em></u><u><em>k</em></u>
The parametric equations of the line are of the form:
x =  + at
 + at
y =  + bt
 + bt
z =  + ct
 + ct
So, the parametric equations are:
<em><u>x = 7 + 3t</u></em>
<em><u>y = 4 + 2t</u></em>
<em><u>z = 5 - 5t</u></em>
 
        
             
        
        
        
Answer:   0
.
0
0
0
1
2
−
0
.
0
2
+
5
+
5
0
0
Step-by-step explanation:
 
        
             
        
        
        
Answer:
need points luvk
Step-by-step explanation:
 
        
                    
             
        
        
        
Step-by-step explanation:
x = n of years of mary
x+8= n of years of her bro
So her brother is (x+8)/x times as old as Mary