Answer:
Here are some things that could help.
Step-by-step explanation:
PEMDAS/GEMDAS
Parentheses/grouping
Exponents (x², x⁷)
Multiplication
Division
Adding
Subtracting
Example:
5²+3(12+2)+6•9
12+2 would be first, then find 5², then 6•9, then the result from 5²+3, and then add the rest of the results.
sorry I'm bad at explaining 
 
        
             
        
        
        
No, the expressions –0.5(3x 5) and –1.5x 2.5 are not equivalent.
Using the distributive property to expand the first expression, you would get -1.5x - 2.5. Since the constant term does not have the same sign as the second expression, the two expressions are not equivalent. 
Also, if you substitute in a value for x and evaluate each expression, the values will not be equal.
Learn more about Equivalent:
brainly.com/question/26992243
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Answer:
The manager did not make a good suggestion.
Any values of x that are less than or equal to -20 will result in a non-negative output and will not meet the customer's needs.