OK so it's telling us to order it from least to greatest, WHICH MEEAANNS we start with the lowest possible number listed. ( I'm gonna turn the fractions into decimals just to make this easier. )
SO, we have:
-1.8 -- 1 -- 1.4 -- 1.9 -- -1.25
Ofc first we start with the negative numbers.
-1.8 and -1.25
( We're just gonna add an extra zero to 1.8 so we can see which is less )
SO, which is less -1.80 or -1.25 
NOW REMEMBER negative numbers are different from positive, they get ranked in the opposite way. WHICH MEANS -1.80 is LESS than -1.25 BECAUSE -1.80 is farther from 0 than -1.25 is. Next is the positive numbers:
1 -- 1.4 -- 1.9
Now, this is the easy part. 1 is the least out of the positive numbers listed, then 1.4 then 1.9! Which makes the order:
-1.8 ----  -1.25 ---- 1 ----  1 2/5 ----  1 9/10
        
             
        
        
        
By "<span>f(x = 2x + 1" you likely meant "f(x) = 2x + 1."
The given interval is [2,5], and so the width of each interval is (5-2)/n, or (3/n). Since we are using right end points, the x value at the right endpoint of the kth rectangle is 2+k(3/n).  Examples:  if k=1, the value at the right endpoint is 2+1(3/n); if k=2, 2+2(3/n), and so on.  If k=n, then the value at the right endpoint is 2+n(3/n), or 2+3=5, which agrees with the given interval [2,5].
Once again, the given function is f(x) = 2x + 1.
At x = 2+k(3/n), the value of the function is 2[2+k(3/n)] + 1 (Answer).  Check:  If k=n, x = 2 + n(3/n) = 2+3 + 5, and f(5)=2(5) + 1 = 11.</span>
        
                    
             
        
        
        
When only angles are specified, the sides can be any length, so the triangle is not unique. In any event, the sum of angles must be 180°, so three angles measuring 50° cannot be closed to form a triangle.
Three sides measuring 4, 8, and 14 ft cannot be closed, either, as the long dimension exceeds the sum of the other two. The ends can't meet.
The appropriate choice is the 3rd one ...
... three sides measuring 5 in, 12 in, and 14 in.
 
        
                    
             
        
        
        
Answer:
n = 10 
Step-by-step explanation:
you can also use( Math -way) its a calculator for any math problem gives you answers fast :) hope i helped  
 
        
             
        
        
        
Answer:
<h2>7:<u><em>
10.5</em></u>=2:3</h2>
Step-by-step explanation:
7/2=3.5
3*3.5=10.5