Answer:
Length is 90yards and width is 60yards
Step-by-step explanation:
Perimeter= 2( length+width)
let the width be x
then the length will be 30 + x
300 = 2(30+x+x)
150 = 30 + 2x
120= 2x
x = 120/2
x = 60 yards
length= 30+x
= 30 + 60
= 90yards
 
        
             
        
        
        
Answer:
29
Step-by-step explanation:
srry took a sec
 
        
             
        
        
        
Answer:
x=10
Step-by-step explanation:
3x+8x=100+10
11x=110
x=110/11
x=10
 
        
             
        
        
        
It'd be easier to do #18 if y ou were to break it up:
                                                        14* (first term + 14th term)
Sum from n=1 to 14 of n =  S      = ---------------------------------
                                               14                       2
                                    
     14(1+14)
= ---------------- = 7(15) = 105 
           2
The sum of twice that is 210.  The sum of "1 from n=1 to n=14" is just 14.
The final sum is 210 + 14 = 224 (answer)
        
             
        
        
        
Answer:
c=
−4
3
s−t+
−4
3
Step-by-step explanation: 
Let's solve for c.
3s+2t−3c−7s−5t=4
Step 1: Add 4s to both sides.
−3c−4s−3t+4s=4+4s
−3c−3t=4s+4
Step 2: Add 3t to both sides.
−3c−3t+3t=4s+4+3t
−3c=4s+3t+4
Step 3: Divide both sides by -3.
−3c
−3
=
4s+3t+4
−3
c=
−4
3
s−t+
−4
3