Answer:Please see answer in explanation column
Step-by-step explanation:
A
The sum of a number and 7 is not more than 10
Given answer: x + 7 < 10  , This is false
Reason :Not more than 10 means at most 10, less than or equal to 10 , " or " not greater than 10 "and therefore the correct inequality  is written as
 x + 7  ≤ 10 
B
The product of a number and 4 is at least 20
Given answer: 4X > 20  ---- False
Reason :At least 20  means at no less than 20 " or " greater than or equal to 20  therefore the correct inequality  is written as
4X ≥ 20  
C
The difference between a 15 and a number is at most 12
Given answer: 15-x>12----False 
Reason :At most 12  means  " no more than 12 , "  " less than or equal to 12 , " or " not greater than 12"therefore the correct inequality  is written as
15-x  ≤  12
D
The quotient of a number and 8 is greater than or equal to
Given answer 8x <3 --False 
 Reason : It clearly stated greater than or equal to 3. Therefore the correct inequality is  8x  ≥ 3
 
        
             
        
        
        
34.5=4h+7c
(34.5-7c)/4=h
Put h= (34.5-7c)/4 into another equation 
30.5=8h+3c
30.5=2(34.5-7c)+3c
30.5=69-14c+3c
11c=38.5
c=38.5/11
Put c=38.5/11 into one of the equations
to calculate the h.
        
             
        
        
        
The slope intercept form y=2x^2-x-13. Hope this helps :)
        
             
        
        
        
Answer:
10
Step-by-step explanation:
5 - 5 = 0 You would want to subtract five from zero giving you -5.