Firstly attention should pe paid to the exact words given in the problem and then only the answer can be easily deduced. 
It is a 2 digit number and that is said in the problem
Now For the tens digit it has been said that it is 8 more than the ones digit. The ones digit cannot be zero and that is already mentioned in the problem.
So if we take the ones digit to be 1, then the tens digit will be= 8 +1
                                                                                                 = 9
Now if we take the ones digit to be 2, then the tens digit will be = 2 + 8
                                                                                                     = 10 
So it cannot be 2 as the tens digit takes the number to a 3 digit number and it is not possible.
So the answer to this problem is 91.
        
             
        
        
        
Constant: A value that doesn't change. Instead, it's a fixed value.
Variable: A symbol (usually a letter) standing in for an unknown numerical value in an equation.
Term: Either a single number or variable, or numbers and variables multiplied together. (Terms are separated by + or − signs, or sometimes by divide.)
Like Terms: Terms whose variables (and their exponents such as the 2 in x2) are the same. In other words, terms that are "like" each other.
Coefficient: A number used to multiply a variable.
        
             
        
        
        
Answ
x and y coordinates
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
let r be radius of the cylinder.
volume of cylinder=πr²h
1728π=πr²×12
r²=1728 π/12π=144
r=√144=12
diameter=2r=2×12=24 cm
 
        
                    
             
        
        
        
Answer:
84 feet of ribbon is needed
Step-by-step explanation:
Given : Ribbon is sold by the foot. If Heather is making 84 bows, how many feet of ribbon must she buy?
Explanation :  If ribbon is sold by the foot, then if Heather is making 84 bows, then Heather would need 84 feet
To put in simple terms - 1 bow needs 1 foot of ribbon