Answer:
the maximum number of letters he can engrave is 50.
Step-by-step explanation:
A company charges $0.10 for each letter engraved bobby plans to spend no more than $5.00 on the engraving.
The maximum number of letters he can engrave can be done by division
 5/0.10
= 50 letters.
 
        
             
        
        
        
Let e=erasers and p=pencils. So we know the total amount of erasers plus pencils sold is equal to 220. Therefore, 

We also know the cost of erasers and pencils totaled to $695 in earnings and so:

and so those are your two equations. 
 
        
        
        
Answer:
(4x + 3)(4x - 3) represents the factorization of a polynomial that was the difference of two squares as it is written as product of sum and difference of two numbers.
Step-by-step explanation:
Formulas are used to factorize the polynomials.
In the given question, we can see a difference of squares
the difference of squares can be factorized using the formula

Here a^2 and b^2 are squares and factorized as sum and difference of numbers.
So in the given options,
(4x + 3)(4x - 3) represents the factorization of a polynomial that was the difference of two squares as it is written as product of sum and difference of two numbers.
 
        
             
        
        
        
Step-by-step explanation:

 
        
             
        
        
        
This can solved using the cosine law which is:
c² = a² + b² - 2ab cos θ
Using the values given from the problem
6² = b² + b² - 2bb cos 112.62
And solving for b
36 = 2b² - 2b² cos 112.62
b = 3.6
The answer is the 3rd option.