Date payments purchases balance number of days product/sum 9/1 - 9/5 $387.52 5 $1,937.60 9/6 $50.00 $337.52 1 $337.52 9/7 - 9/18 $ $ 9/19 $62.26 $399.78 1 $399.78 9/20 - 9/30 $ $ total 30 $ the average daily balance = ÷ 30 = $. finance charge = monthly rate x average daily balance = $. new balance = previous balance - payment/credits + finance charge + new purchases = $.

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

income. 10x+1300

expenses 3x+(1800+1500)

expenses 3x+3300

to break even:

income = expense,

10x + 1300 = 3x + 3300,

solve for x.

step-by-step explanation:

mark brainliest