Part A:

A coefficient can be either '15' or '25'.

A variable can be either 'w' or 'm'.

A constant is 65.

Part B:

Simply substitute, or plug-in, the numbers and solve.

***Step 1:

65+15w+25m --> 65+15(20)+25(3)

You do this because you are substituting the 'w' for the number

of weeks that Jaxon saved up for, which is 20, and the 'm' for the number

of times that Jaxon mowed the lawn, which is 3.

***Step 2:

65+15(20)+25(3) --> 65+300+75

Begin to solve, using PEMDAS, or whichever acronym you learned.

Remember, if you are using PEMDAS, recall that the order is Parenthesis,

Exponents, Multiplication/Division (whichever comes first), and

Addition/Subtraction (whichever comes first). Here, I checked for parenthesis.

I did find parenthesis, however, they do not have any expressions inside of

them, meaning that these parenthesis are for multiplying, and not for stating

order. So, you skip parenthesis. Next, you check for exponents, which you

find none of, so you skip over that. Now, we get to multiplying/dividing, so

you multiply the 15 and the 20 to get 300, and the 25 and 3 to get 75.

***Step 3:

65+300+75 --> 440

Now, we get to addition. You simply add everything up to get your final

answer: $440.

Part C:

If Jaxon had $75, then yes, the coefficients would change.

By subtracting $65 from $75, we can see that the total amount of money

from Jaxon's deposits and his lawn-mowing money is $10. Jaxon already

deposits $15 a week, meaning that, while using the current equation, Jaxon

CANNOT have $75 in his bank account. We can change the equation

so that Jaxon is able to have $75 in his savings account. You can change

the coefficient of 15 to 10, and the other coefficient of 25 to 0.

Now Jaxon is able to have $75 in his savings account.

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