Dan charges a fixed amount per hour. He charges £180 for a job which takes 12 hours. Work how much he will charges for a job which will take 18 hours.

18 hours = £270

Step-by-step explanation:

Find how much he charges per hour. Divide:

So ha charges about 15 an hour. Multiply this price by the number of hours:

Therefore, he will charge £270 for a job that takes 18 hours.

OR

Set a proportional relationship since he charges a fixed amount:

Insert the appropriate corresponding values:

Solve for the price after 18 hours of work, represented by x. Cross multiply:

Solve for x. Use inverse operations to isolate the variable. Divide both sides by 12:

Therefore, after 18 hours, he will charge £270.

:Done

answer: i think one of the answer is $150 and $300?

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 -