I need help with pre-algebra problems

[Lynette777]

How do you work these problems?:razz:
Evaluate 18-7 divided by (1/5 + 1/2)
(0.56 - 0.37)x3
Evaluate 4 x 11 - 5^2
(4^2 -6) divided by 2
Solve this equation x + 21 = 47
Solve this equation 7x = 28
A number is six times another number. When the numbers are added, their sum is 49. What are the numbers?
A student took a test composedd of 20 questions, with correct answers worth 3 points. If the student received 48 points for his grade, how many questions were correct?

 

[mmm4444bot]

Lynette: You posted at the end of somebody else's discussion, so I moved your post. In the future, please click the [Post New Thread] button, to begin your own new discussion.


When I see a laundry list of exercises with no questions asked by the poster, my first thought is, "This person is fishing for somebody to do their assignment."

Is this the case?

If so, you're at the wrong site.

If not, then please tell us why you are stuck OR show whatever work that you can.

Thank you! :cool:

 

[jsterkel]

For the first several questions, I recommend PEMDAS:
http://www.google.com/#q=PEMDAS