Milly has $83.50 in her savings account. she deposits $15 every week. her mother also deposits $10 into the account every time milly washes the car. her savings account balance can be shown with the following expression:

10c + 15w + 83.50

part a: identify a coefficient, a variable, and a constant in this expression. (3 points)

part b: if milly saves for 15 weeks and washes the car 4 times, how much will she have in her account? show your work to receive full credit. (4 points)

part c: if milly’s mom deposited $20 after each car wash, would the coefficient, variable, or constant in the expression change? why? (3 points)

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answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1