What is 60% of $80.dollars

there are many ways to answer this problem. you can use portions and you can change the percent to a decimal.

the portions way is you do 60/100 = x/80

you do cross multiply so 60*80 and you get 4800 then you divide by 100.

or the easier way you convert the percent to a decimal and the you multiply it with the cost
0.6*80=48

answer: ok

step-by-step explanation:

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 -