Answer:
Step-by-step explanation:
The third, fifth and sixth expressions (from the top) are NOT polynomials, and the reason in each case is that the expression has one or more negative powers of x in it.
 
        
             
        
        
        
Answer:
570 miles
Step-by-step explanation:
304/4 is how many miles it travels in each hour and if its 7.5 hours then you multiply that by each mile it takes each hour. 
304/4 = 76
76 x 7.5 = 570
 
        
             
        
        
        
Point slope form of a line:

 where 

 is your slope and 

 is a point on your line.
For a line with a slope of 3/5 that passes through (10, -2)...

Let's plug these values into our formula.

Subtracting by a negative is the same thing as adding (the double negatives cancel), so let's simplify that.

There's our equation in point-slope form. (keep in mind that you're not going to want to distribute that 3/5 or subtract the 2 or anything. You want to keep it similar to the formula.
 
        
        
        
Answer:
 27 girls 
Step-by-step explanation:
boys 2 : 3 girls
18: x
18×3= 54:2x
54÷2= 27